| Name | Nation | Sport | Games | Notes |
|---|
| Alexander Gschliesser | Italy | Ice hockey | 1994 Winter | |
| Peter Gschnitzer | Luge | 1976 Winter, 1980 Winter | |
| Selina Gschwandtner | Germany | Shooting | 2016 Summer | |
| Georges Gschwind | Switzerland | Rowing | 1936 Summer | |
| Karl Gschwind | Boxing | 1972 Summer | |
| Hans Gstöttner | East Germany, Germany | Wrestling | 1988 Summer, 1992 Summer | |
| Bernhard Gstrein | Austria | Alpine skiing | 1988 Winter, 1992 Winter, 1994 Winter | |
| Josl Gstrein | Cross country skiing, Nordic combined | 1948 Winter | |
| Knud Gøtke [ Wikidata ] | Denmark | Rowing | 1912 Summer | |
| Gu Beibei | China | Artistic swimming | 2004 Summer, 2008 Summer | |
| Gu Bingfeng | Field hockey | 2020 Summer, 2024 Summer | |
| Gu Bon-gil | South Korea | Fencing | 2012 Summer, 2016 Summer, 2020 Summer, 2024 Summer | |
| Daniel Gu [ Wikidata ] | Canada | 2024 Summer | |
| Eileen Gu | China | Freestyle skiing | 2022 Winter | |
| Gu Gyo-dong | South Korea | Fencing | 1992 Summer | |
| Gu Hong | China | Boxing | 2020 Summer | |
| Gu Hyeon-suk | South Korea | Judo | 1992 Summer | |
| Gu Jiahong | China | Rowing | 1984 Summer | |
| Gu Jin-su | South Korea | Field hockey | 1996 Summer | |
| Gu Juan | Singapore | Badminton | 2012 Summer | |
| Gu Jun | China | 1996 Summer, 2000 Summer | |
| Gu Junjie | Athletics | 2008 Summer | |
| Gu Mun-yeong | South Korea | Field hockey | 1992 Summer | |
| Gu Sang-bum | Football | 1988 Summer | |
| Gu Sung-eun | Road cycling | 2008 Summer | |
| Gu Sung-yun | Football | 2016 Summer | |
| Gu Xiao | China | Artistic swimming | 2016 Summer | |
| Gu Xiaoli | Rowing | 1992 Summer, 1996 Summer | |
| Gu Xuesong | Archery | 2016 Summer | |
| Gu Yan | Athletics | 1996 Summer | |
| Gu Yaoyao | Rugby sevens | 2020 Summer, 2024 Summer | |
| Gu Yasha | Football | 2008 Summer, 2016 Summer | |
| Gu Yu | Boxing | 2008 Summer | |
| Gu Yuan | Athletics | 2004 Summer | |
| Lucio Guachalla | Bolivia | 1976 Summer | |
| Luis Antonio de Guadalmina [ Wikidata ] | Spain | Equestrian driving | 1900 Summer | |
| Eduardo Guadamud | Ecuador | Weightlifting | 2008 Summer | |
| José Alberto Guadarrama | Mexico | Football | 1992 Summer | |
| Ageze Guadie | Israel | Athletics | 2016 Summer | |
| Lorena Guado | Argentina | Shooting | 1996 Summer | |
| Gianna Guaita [ Wikidata ] | Italy | Artistic gymnastics | 1936 Summer | |
| Flávio Gualberto | Brazil | Volleyball | 2024 Summer | |
| Mirco Gualdi | Italy | Road cycling | 1992 Summer | |
| Jacques Ben Gualid | Morocco | Fencing | 1960 Summer | |
| Byron Guamá | Ecuador | Road cycling | 2012 Summer, 2016 Summer | |
| Maritza Guamán | Athletics | 2016 Summer | |
| Yadira Guamán | 2012 Summer | |
| Guan Chenchen | China | Artistic gymnastics | 2020 Summer | |
| Guan Bunima | Wrestling | 1984 Summer | |
| Guan Weinan | Ice hockey | 2002 Winter | |
| Guan Weizhen | Badminton | 1992 Summer | |
| Guan Xin | Basketball | 2012 Summer | |
| Guan Yingnan | Athletics | 2000 Summer, 2004 Summer | |
| Guan Yingying | Ice hockey | 2022 Winter | |
| Guan Zewen | Artistic swimming | 1992 Summer | |
| Guan Ziyan | Freestyle skiing | 2018 Winter | |
| Francisco Guanco | Philippines | Swimming | 1984 Summer | |
| Li Guangquan | China | Alpine skiing | 1984 Winter | |
| Niu Guangsheng [ Wikidata ] | Swimming | 2024 Summer | |
| Laëtitia Guapo | France | 3x3 basketball | 2020 Summer, 2024 Summer | |
| Francisco Guaragna Rigonat | Argentina | Sailing | 2020 Summer, 2024 Summer | |
| Gioacchino Guaragna | Italy | Fencing | 1928 Summer, 1932 Summer, 1936 Summer | |
| Peter Guarasci | Canada | Basketball | 2000 Summer | |
| Désiré Guard | France | Field hockey | 1920 Summer | |
| Nelson Guarda | Brazil | Rowing | 1956 Summer | |
| Albert Guardado | United States | Boxing | 1996 Summer | |
| Alvaro Guardia | Costa Rica | Shooting | 1980 Summer, 1992 Summer | |
| Bernardo de la Guardia | Fencing | 1936 Summer | |
| Enrique Guardia | Spain | Water polo | 1972 Summer | |
| Guillermo Guardia | Costa Rica | Football | 1984 Summer | |
| Vicente de la Guardia | Cuba | Sailing | 1980 Summer | |
| Fabio Guardigli | San Marino | Alpine skiing | 1988 Winter | |
| Gedeón Guardiola | Spain | Handball | 2012 Summer, 2020 Summer | |
| Jorge Guardiola | Shooting | 1988 Summer, 1992 Summer | |
| Pep Guardiola | Football | 1992 Summer | |
| Marcello Guarducci | Italy | Swimming | 1972 Summer, 1976 Summer, 1984 Summer | |
| Giulia Guarieiro | Brazil | Handball | 2020 Summer, 2024 Summer | |
| Matteo Guarise | Italy | Figure skating | 2014 Winter, 2018 Winter, 2022 Winter | |
| Osmar Guarnelli | Brazil | Football | 1972 Summer | |
| Megan Guarnier | United States | Road cycling | 2016 Summer | |
| Adriano Guarnieri | Italy | Alpine skiing | 1936 Winter | |
| Jorge Guarnieri | Argentina | Shooting | 2000 Summer | |
| Rodolfo Guarnieri | 1968 Summer | |
| Ricardo Guasch | Mexico | Equestrian jumping | 1964 Summer, 1968 Summer | |
| Rodolfo Guaves | Philippines | Track cycling | 1984 Summer | |
| Rolando Guaves | 1968 Summer | |
| Erik Guay | Canada | Alpine skiing | 2006 Winter, 2010 Winter, 2014 Winter | |
| Lucie Guay | Canoe sprint | 1984 Summer | |
| Paul Guay | United States | Ice hockey | 1984 Winter | |
| Vittoria Guazzini | Italy | Track cycling | 2020 Summer, 2024 Summer | |
| Paulina Guba | Poland | Athletics | 2016 Summer, 2020 Summer | |
| Anastasiia Gubanova | Georgia | Figure skating | 2022 Winter | |
| Ernő Gubányi | Hungary | Handball | 1976 Summer, 1980 Summer | |
| Sergey Gubarev | Kazakhstan | Water polo | 2012 Summer | |
| Gulnaz Gubaydullina | Russia, Russian Olympic Committee | Modern pentathlon | 2016 Summer, 2020 Summer | |
| Cor Gubbels | Netherlands | Athletics | 1920 Summer | |
| Chelsea Gubecka | Australia | Marathon swimming | 2016 Summer, 2024 Summer | |
| Peter Gübeli | Switzerland | Rowing | 1948 Summer | |
| Jasminka Guber | Bosnia and Herzegovina | Athletics | 2004 Summer | |
| Ante Guberina | Yugoslavia | Rowing | 1964 Summer | |
| Ivan Gubijan | Athletics | 1948 Summer, 1952 Summer | |
| Aleksandr Gubin | Soviet Union | Cross country skiing | 1960 Winter, 1964 Winter | |
| Tatyana Gubina | Kazakhstan | Water polo | 2000 Summer, 2004 Summer | |
| Irina Gubkina | Unified Team, Russia | Luge | 1992 Winter, 1994 Winter, 1998 Winter | |
| Lyudmila Gubkina | Belarus | Athletics | 2000 Summer | |
| Gary Gubner | United States | Weightlifting | 1964 Summer | |
| Kim Gubser | Switzerland | Freestyle skiing | 2022 Winter | |
| Gregory Gucassoff | Belgium | Field hockey | 2008 Summer | |
| Chris Guccione | Australia | Tennis | 2008 Summer, 2016 Summer | |
| Matic Ian Guček | Slovenia | Athletics | 2024 Summer | |
| Vladimir Guchsha | Kazakhstan | Shooting | 2000 Summer | |
| Mehmet Güçlü | Turkey | Wrestling | 1972 Summer | |
| Mateusz Gucman | Poland | 2008 Summer | |
| György Guczoghy | Hungary | Artistic gymnastics | 1980 Summer, 1988 Summer | |
| Leo Gudas | Czechoslovakia | Ice hockey | 1992 Winter | |
| Radko Gudas | Czech Republic | 2014 Winter | |
| Guram Gudashvili | Soviet Union | Athletics | 1968 Summer | |
| Zigmas Gudauskas | Lithuania | Rowing | 1992 Summer | |
| Halldór Guðbjörnsson | Iceland | Judo | 1980 Summer | |
| Franziska Gude | Germany | Field hockey | 2000 Summer, 2004 Summer | |
| Helmut Gude | Athletics | 1952 Summer | |
| Aušra Gudeliūnaitė | Soviet Union | Rowing | 1988 Summer | |
| Bruno Gudelj | Croatia | Handball | 1996 Summer | |
| Ivan Gudelj | Yugoslavia | Football | 1980 Summer | |
| Johann Baptist Gudenus | Austria | Bobsleigh, Athletics | 1932 Winter, 1936 Summer, 1936 Winter | |
| Ercüment Güder | Turkey | Football | 1952 Summer | |
| Marcia Gudereit | Canada | Curling | 1998 Winter | |
| Tatiana Guderzo | Italy | Road cycling, Track cycling | 2004 Summer, 2008 Summer, 2012 Summer, 2016 Summer | |
| Maurice Gudin de Vallerin | France | Equestrian jumping | 1936 Summer | |
| Natalia Gudina | Israel | Figure skating | 2002 Winter | |
| Jorge Gudiño | Mexico | Basketball | 1948 Summer | |
| Viðar Guðjohnsen | Iceland | Judo | 1976 Summer | |
| Snorri Guðjónsson | Handball | 2004 Summer, 2008 Summer, 2012 Summer | |
| Tatyana Gudkova | Russia | Athletics | 2000 Summer | |
| Birgir Guðlaugsson | Iceland | Cross country skiing | 1964 Winter | |
| Kristers Gudļevskis | Latvia | Ice hockey | 2014 Winter | |
| Hrafnhildur Guðmundsdóttir | Iceland | Swimming | 1964 Summer, 1968 Summer | |
| Íris Guðmundsdóttir | Alpine skiing | 2010 Winter | |
| Lilja Guðmundsdóttir | Athletics | 1976 Summer | |
| Ari Guðmundsson | Swimming, Ski jumping | 1948 Summer, 1952 Winter | |
| Bjarni Guðmundsson | Handball | 1984 Summer | |
| Brynjar Guðmundsson | Alpine skiing | 2014 Winter | |
| Friðrik Guðmundsson | Athletics | 1952 Summer | |
| Friðrik Guðmundsson | Swimming | 1972 Summer | |
| Guðjón Guðmundsson | 1972 Summer | |
| Guðmundur Guðmundsson | Handball | 1984 Summer, 1988 Summer | |
| Hjalti Guðmundsson | Swimming | 2000 Summer | |
| Hreiðar Guðmundsson | Handball | 2008 Summer, 2012 Summer | |
| Jón Ingi Guðmundsson | Water polo | 1936 Summer | |
| Niklas Gudmundsson | Sweden | Football | 1992 Summer | |
| Pétur Guðmundsson | Iceland | Athletics | 1988 Summer, 1992 Summer | |
| Ragnar Guðmundsson | Swimming | 1988 Summer | |
| Skarphéðinn Guðmundsson | Ski jumping | 1960 Winter | |
| Þórður Guðmundsson | Water polo | 1936 Summer | |
| Guðni Valur Guðnason | Athletics | 2016 Summer, 2020 Summer | |
| Oskars Gudramovičs | Latvia | Luge | 2010 Winter, 2014 Winter, 2018 Winter | |
| Timothy Gudsell | New Zealand | Road cycling | 2008 Summer | |
| Marko Gudurić | Serbia | Basketball | 2024 Summer | |
| Valeriia Gudym | Ukraine | Rhythmic gymnastics | 2012 Summer, 2016 Summer | |
| Lyudmila Gudz | Unified Team | Handball | 1992 Summer | |
| Daina Gudzinevičiūtė | Lithuania | Shooting | 1996 Summer, 2000 Summer, 2004 Summer, 2008 Summer, 2012 Summer | |
| Andrius Gudžius | Athletics | 2016 Summer, 2020 Summer, 2024 Summer | |
| Dominique Guebey | France | 1984 Summer | |
| Enrique Guedes | Cuba | Shooting | 1968 Summer | |
| Ricardo Guedes | Uruguay | Road cycling | 1996 Summer | |
| Javier Guédez | Venezuela | Judo | 2008 Summer, 2012 Summer | |
| Antoinette Guedia Mouafo | Cameroon | Swimming | 2008 Summer, 2012 Summer | |
| Élodie Guégan | France | Athletics | 2008 Summer | |
| Michel Gueguen | Modern pentathlon | 1972 Summer, 1976 Summer | |
| Raoul Gueguen | 1968 Summer, 1972 Summer | |
| Wandou Guehi | Ivory Coast | Handball | 1988 Summer | |
| Delphine Guehl | France | 2004 Summer | |
| Floria Gueï | Athletics | 2012 Summer, 2016 Summer, 2020 Summer | |
| Maurice Gueissaz | Switzerland | Rowing | 1948 Summer | |
| Ferdinand Gueldry | France | Art competitions | 1912 Summer | |
| Eduardo Guelfand | Argentina | Field hockey | 1968 Summer | |
| Claudia Gueli | Australia | Freestyle skiing | 2018 Winter | |
| Christophe Guelpa | France | Shooting | 1988 Summer | |
| Robert Guelpa | Rowing | 1928 Summer | |
| Fabrice Guelzec | Artistic gymnastics | 1992 Summer | |
| Georges Guelzec | 1972 Summer | |
| Abraham Guem | South Sudan | Athletics | 2020 Summer, 2024 Summer | |
| Denise Guénard | France | 1952 Summer, 1960 Summer, 1964 Summer | |
| German Guenard | Puerto Rico | 1960 Summer | |
| Mahmoud Guendouz | Algeria | Football | 1980 Summer | |
| Danielle Guéneau | France | Athletics | 1964 Summer | |
| Wanda Guenette | Canada | Volleyball | 1996 Summer | |
| Talaat Guenidi | Egypt | Basketball | 1972 Summer | |
| Gérald Guennelon | France | Ice hockey | 1992 Winter, 1994 Winter | |
| Olfa Guenni | Tunisia | Table tennis | 2004 Summer | |
| Amine Guennichi | Wrestling | 2020 Summer | |
| Christophe Guénot | France | 2008 Summer, 2012 Summer | |
| Steeve Guénot | 2008 Summer, 2012 Summer | |
| Lloyd Guenther | United States | Speed skating | 1932 Winter | |
| Anthonij Guépin | Netherlands | Sailing | 1924 Summer | |
| Martine Guépin | France | Shooting | 1988 Summer | |
| Henri Guerbois | Art competitions | 1924 Summer | |
| Mario Guerci | Argentina | Rowing | 1948 Summer | |
| Philippe Guerdat | Switzerland | Equestrian jumping | 1984 Summer, 1988 Summer | |
| Steve Guerdat | 2004 Summer, 2008 Summer, 2012 Summer, 2016 Summer, 2020 Summer, 2024 Summer | |
| Michelle Guerette | United States | Rowing | 2004 Summer, 2008 Summer | |
| Daniela Guergueltcheva | Bulgaria | Table tennis | 1988 Summer, 1992 Summer | |
| Abdel Ghani Guériguer | Morocco | Athletics | 1992 Summer | |
| Vanina Guerillot [ Wikidata ] | Portugal | Alpine skiing | 2022 Winter | |
| Bill Guerin | United States | Ice hockey | 1998 Winter, 2002 Winter, 2006 Winter | |
| Charles Guérin [ Wikidata ] | France | Fencing | 1900 Summer | |
| Henri Guérin | 1948 Summer | |
| Lina Guérin | Rugby sevens | 2016 Summer, 2020 Summer | |
| Vincenzo Guerini | Italy | Athletics | 1972 Summer, 1976 Summer | |
| Stéphane Guérinot | France | Rowing | 1996 Summer | |
| Audrey Guérit | Swimming | 1992 Summer | |
| L. Guerner | United States | Artistic gymnastics | 1904 Summer | |
| Rabiou Guero Gao | Niger | Athletics | 2012 Summer | |
| Jean-Pierre Guéron | Switzerland | Speed skating | 1964 Winter | |
| Alejandra de la Guerra | Peru | Volleyball | 1988 Summer | |
| Alejandro Guerra | Argentina | Biathlon | 1992 Winter | |
| Ascension Guerra | Spain | Archery | 1984 Summer | |
| Carlos Guerra | Mexico | Volleyball | 2016 Summer | |
| Carlos de la Guerra | Peru | Athletics | 1936 Summer | |
| Clara Guerra | Italy | Rowing | 2024 Summer | |
| Elena Guerra | Uruguay | Athletics | 2004 Summer | |
| Elvira Guerra | Italy | Equestrian dressage | 1900 Summer | |
| Evandro Guerra | Brazil | Volleyball | 2016 Summer | |
| Gino Guerra | Italy | Track cycling | 1948 Summer | |
| Ignacio Guerra | Chile | Athletics | 2008 Summer | |
| Jaime Guerra | Mexico | Equestrian jumping | 1992 Summer, 1996 Summer | |
| Javier Guerra | Water polo | 1976 Summer | |
| Javier Guerra | Spain | Athletics | 2020 Summer | |
| Jorge Guerra | Chile | Road cycling | 1936 Summer | |
| José Guerra | Cuba | Diving | 2000 Summer, 2004 Summer, 2008 Summer, 2012 Summer | |
| José Francisco Guerra | Spain | Fencing | 1992 Summer, 1996 Summer | |
| Leyde Guerra | Peru | Athletics | 2020 Summer | |
| Lisandra Guerra | Cuba | Track cycling | 2008 Summer, 2012 Summer, 2016 Summer | |
| Manuel Guerra | Portugal | Shooting | 1924 Summer, 1932 Summer | |
| Manuel Guerra | Spain | Swimming | 1948 Summer | |
| Maria Isabel Guerra | Brazil | 1972 Summer | |
| Patricia Guerra | Spain | Sailing | 1988 Summer, 1992 Summer | |
| Paulo Guerra | Portugal | Athletics | 1996 Summer | |
| Pietro Guerra | Italy | Road cycling | 1964 Summer | |
| Roberto Guerra | Cuba | Boxing | 2000 Summer | |
| Rodolfo Guerra | Mexico | Wrestling | 1968 Summer | |
| Silvio Guerra | Ecuador | Athletics | 1996 Summer, 2000 Summer, 2004 Summer | |
| Jonathan Guerreiro | Russian Olympic Committee | Figure skating | 2018 Winter | |
| Alberto Guerrero | Puerto Rico | Shooting | 1952 Summer, 1968 Summer | |
| Arturo Guerrero | Mexico | Basketball | 1968 Summer, 1976 Summer | |
| Belem Guerrero | Track cycling, Road cycling | 1996 Summer, 2000 Summer, 2004 Summer | |
| Bernardo Guerrero | Chile | Rowing | 2016 Summer | |
| Carla Guerrero | Football | 2020 Summer | |
| Carlos Guerrero | Mexico | Shooting | 1932 Summer | |
| Eduardo Guerrero | Argentina | Rowing | 1952 Summer | |
| Eric Guerrero | United States | Wrestling | 2004 Summer | |
| Esther Guerrero | Spain | Athletics | 2016 Summer, 2020 Summer, 2024 Summer | |
| Héctor Guerrero | Mexico | Basketball | 1948 Summer, 1952 Summer | |
| Ilse Guerrero | Athletics | 2020 Summer, 2024 Summer | |
| Iván Guerrero | Honduras | Football | 2000 Summer | |
| Jenny Guerrero | Philippines | Swimming | 2000 Summer | |
| Jesús Guerrero | Spain | Handball | 1972 Summer | |
| Manuel Guerrero | Argentina | Basketball | 1948 Summer | |
| Osleni Guerrero | Cuba | Badminton | 2016 Summer | |
| Patricia Guerrero | Peru | Athletics | 1980 Summer | |
| Pere Guerrero | Spain | Canoe slalom | 1992 Summer | |
| Roberto Guerrero | Argentina | Track cycling | 1948 Summer | |
| Rubén Guerrero | El Salvador | Swimming | 1968 Summer | |
| Sébastien Guerrero [ Wikidata ] | France | Shooting | 2024 Summer | |
| Angel Guerreros | Paraguay | Athletics | 1972 Summer | |
| Francisco Güerri | Spain | Football | 1980 Summer | |
| Kamel Guerri | Algeria | Alpine skiing | 1992 Winter | |
| Mourad Guerri | 1992 Winter | |
| Carlos Guerrico | Argentina | Fencing | 1924 Summer | |
| André Guerrier | France | Sailing | 1924 Summer | |
| Guerrinha | Brazil | Basketball | 1988 Summer, 1992 Summer | |
| Giancarlo Guerrini | Italy | Water polo | 1960 Summer, 1964 Summer, 1968 Summer | |
| Hicham El Guerrouj | Morocco | Athletics | 1996 Summer, 2000 Summer, 2004 Summer | |
| Jérôme Guery | Belgium | Equestrian jumping | 2016 Summer, 2020 Summer, 2024 Summer | |
| Mohamed Ben Guesmia | Algeria | Boxing | 1992 Summer | |
| Abdelati El Guesse | Morocco | Athletics | 2016 Summer, 2020 Summer, 2024 Summer | |
| Charlie Guest | Great Britain | Alpine skiing | 2018 Winter, 2022 Winter | |
| David Guest | Australia | Field hockey | 2008 Summer | |
| Freddie Guest | Great Britain | Polo | 1924 Summer | |
| Irene Guest | United States | Swimming | 1920 Summer | |
| Jack Guest | Canada | Rowing | 1928 Summer | |
| Laurence Guest | Great Britain | 1952 Summer | |
| Matthew Guest | Canada | Field hockey | 2016 Summer | |
| Paul Guest | Australia | Rowing | 1960 Summer, 1964 Summer, 1968 Summer | |
| Peter Guest | 1960 Summer | |
| Joan Guetschow | United States | Biathlon | 1992 Winter, 1994 Winter | |
| Mansour Guettaya | Tunisia | Athletics | 1972 Summer | |
| Dumas Guette | Colombia | Football | 1972 Summer | |
| Ana Guevara | Mexico | Athletics | 2000 Summer, 2004 Summer | |
| Armando Guevara | Venezuela | Boxing | 1976 Summer, 1980 Summer | |
| Ena Guevara | Peru | Athletics | 1984 Summer, 1992 Summer | |
| Héctor de Guevara | Football | 1960 Summer | |
| Jesús Guevara | Venezuela | Boxing | 1996 Summer | |
| Manuel Guevara | Road cycling | 1996 Summer, 2000 Summer | |
| Alioune Badara Guèye | Senegal | Basketball | 1968 Summer, 1972 Summer | |
| Amadou Guèye | Judo | 1992 Summer | |
| Awa Guèye | Basketball | 2000 Summer | |
| Daour M'baye Guèye | Athletics | 1964 Summer, 1968 Summer | |
| Ibrahima Guèye | 1976 Summer | |
| Idrissa Gueye | Football | 2012 Summer | |
| Lamine Guèye | Alpine skiing | 1984 Winter, 1992 Winter, 1994 Winter | |
| Magaye Gueye | Football | 2012 Summer | |
| Mohamed Guèye | Table tennis | 2004 Summer | |
| Moustapha Guèye | Wrestling | 1988 Summer | |
| Ndiatte Gueye | Canoe sprint | 2012 Summer | |
| Ousseynou Guèye | Judo | 1984 Summer | |
| Papa Gueye | Football | 2012 Summer | |
| Eya Guezguez | Tunisia | Sailing | 2020 Summer | |
| Sarra Guezguez | 2020 Summer | |
| Charles Guézille | France | Athletics | 1920 Summer | |
| Maurice Gufflet | Sailing | 1900 Summer | |
| Robert Gufflet | 1900 Summer, 1928 Summer | |
| Edith Gufler | Italy | Shooting | 1984 Summer | |
| Frants Gufler | Denmark | Curling | 2002 Winter | |
| Johannes Gufler | Austria | Shooting | 1988 Summer | |
| Aurel Guga | Romania | Football | 1924 Summer | |
| Georgi Gugava | Georgia | Judo | 2000 Summer | |
| Georg Guggemos | Germany | Ice hockey | 1952 Winter | |
| Matthias Guggenberger | Austria | Skeleton | 2010 Winter, 2014 Winter, 2018 Winter | |
| Muriel Guggolz | United States | Fencing | 1932 Summer | |
| Christian Gugler | Switzerland | Athletics | 1988 Summer | |
| Annie Guglia | Canada | Skateboarding | 2020 Summer | |
| Savino Guglielmetti | Italy | Artistic gymnastics | 1932 Summer, 1936 Summer, 1948 Summer | |
| Alejandro Guglielmi | Argentina | Equestrian eventing | 1972 Summer | |
| Gustavo Guglielmone | Track cycling | 1992 Summer | |
| Armin Guhl | Switzerland | Athletics | 1936 Summer | |
| Gui Chaoran | China | Volleyball | 2000 Summer | |
| Isabel Guialo | Angola | Handball | 2012 Summer, 2016 Summer, 2020 Summer | |
| Ronaldo Guiaro | Brazil | Football | 1996 Summer | |
| Brigitte Guibal | France | Canoe slalom | 2000 Summer | |
| Étienne Guibel | Field hockey | 1936 Summer | |
| Apollon Guiber von Greifenfels | Russia | Fencing | 1912 Summer | |
| Gisèle Guibert [ Wikidata ] | France | Artistic gymnastics | 1948 Summer | |
| Ecaterina Guica | Canada | Judo | 2016 Summer, 2020 Summer | |
| Marielle Guichard | France | Road cycling | 1984 Summer | |
| Yann Guichard | Sailing | 2000 Summer | |
| Rianne Guichelaar | Netherlands | Water polo | 2008 Summer | |
| Pierre Guichot | France | Fencing | 1984 Summer, 1988 Summer, 1992 Summer | |
| George Guida | United States | Athletics | 1948 Summer | |
| Maria Guida | Italy | 1996 Summer | |
| Ghazi Guidara | Tunisia | Volleyball | 1996 Summer, 2004 Summer | |
| Anatolie Guidea | Bulgaria | Wrestling | 2012 Summer | |
| Ivan Guidea | Romania | 2016 Summer | |
| Emanuele Guidi | San Marino | Archery | 2012 Summer | |
| Guilherme Guido | Brazil | Swimming | 2008 Summer, 2016 Summer, 2020 Summer | |
| Luigi Guido | Italy | Judo | 1992 Summer, 1996 Summer, 2000 Summer | |
| Reibel Guido | Germany | Water polo | 1992 Summer | |
| Sara Guido | Mexico | Swimming | 1984 Summer | |
| Giachem Guidon | Switzerland | Cross country skiing | 1984 Winter, 1988 Winter, 1992 Winter, 1994 Winter | |
| Carlette Guidry-White | United States | Athletics | 1992 Summer, 1996 Summer | |
| Abraham Gneki Guié | Ivory Coast | Football | 2008 Summer | |
| Jeff Guiel | Canada | Baseball | 2004 Summer | |
| Christian Guiffroy | France | Artistic gymnastics | 1964 Summer, 1968 Summer, 1972 Summer | |
| Martina Guiggi | Italy | Volleyball | 2008 Summer, 2016 Summer | |
| Elodie Guiglion | France | Rugby sevens | 2016 Summer | |
| Charlène Guignard | Italy | Figure skating | 2014 Winter, 2018 Winter, 2022 Winter | |
| Christelle Guignard | France | Alpine skiing | 1984 Winter, 1988 Winter, 1992 Winter | |
| Roger-Claude Guignard | Switzerland | Sailing | 1980 Summer | |
| Nicolas Guigon | France | Athletics | 2004 Summer | |
| Antonin Guigonnat | Biathlon | 2018 Winter | |
| Michaël Guigou | Handball | 2004 Summer, 2008 Summer, 2012 Summer, 2016 Summer, 2020 Summer | |
| Claude Guiguet | Modern pentathlon | 1976 Summer | |
| Lucien Guiguet | 1968 Summer | |
| Brigitte Guigui | Ivory Coast | Handball | 1988 Summer | |
| Patricia Guijarro | Spain | Football | 2024 Summer | |
| Rafael Guijosa | Handball | 1996 Summer, 2000 Summer | |
| Mavis Guilarte | Cuba | Volleyball | 1972 Summer, 1980 Summer | |
| Marie-Pierre Guilbaud | France | Cross country skiing | 1992 Winter | |
| Edgardo Guilbe | Puerto Rico | Athletics | 1988 Summer, 1992 Summer | |
| Guilbert [ Wikidata ] | France | Rowing | 1900 Summer | |
| Christian Guilbert | 1948 Summer | |
| Leandro Guilheiro | Brazil | Judo | 2004 Summer, 2008 Summer, 2012 Summer | |
| Chris Guiliano | United States | Swimming | 2024 Summer | |
| Nicole Guilini | Belgium | 1952 Summer | |
| Guy Guillabert | France | Rowing | 1956 Summer | |
| Robert Guillard | Bobsleigh | 1952 Winter | |
| Ilionis Guillaume | Athletics | 2024 Summer | |
| Sylvain Guillaume | Nordic combined | 1992 Winter, 1994 Winter, 1998 Winter | |
| Max Guilleaume | Germany | Equestrian driving | 1900 Summer | |
| Alexandre Guillemand [ Wikidata ] | France | Fencing | 1900 Summer | |
| Mathias Guillemette | Canada | Track cycling | 2024 Summer | |
| René Guillemin | France | 1924 Summer | |
| Agathe Guillemot | Athletics | 2024 Summer | |
| Joseph Guillemot | 1920 Summer | |
| Fernando Guillén | Spain | Fencing | 1924 Summer | |
| Jorge Guillén | Basketball | 1960 Summer | |
| Madeline Guillén | Dominican Republic | Volleyball | 2024 Summer | |
| Heissler Guillent | Venezuela | Basketball | 2016 Summer | |
| Fred Guillermety | Puerto Rico | Shooting | 1960 Summer, 1964 Summer | |
| Gildas Guillerot | France | Sailing | 1984 Summer | |
| Louise Guillet | Water polo | 2024 Summer | |
| Georges Guillez | Athletics | 1936 Summer | |
| Lucien Guillier | 1952 Summer | |
| Robert Guillin | Basketball | 1952 Summer | |
| Georges Guillon | Athletics | 1920 Summer | |
| Olivier Guillon [ Wikidata ] | Equestrian jumping | 2012 Summer | |
| Guillot [ Wikidata ] | Track cycling | 1900 Summer | |
| Mario Guilloti | Argentina | Boxing | 1968 Summer | |
| Fernand Guillou | France | Basketball | 1948 Summer | |
| Jean Guillou | Artistic gymnastics | 1952 Summer, 1956 Summer | |
| Jean-Marie le Guillou | Sailing | 1972 Summer | |
| Laurence Guillou | Swimming | 1988 Summer | |
| Marcel Guillouet | Athletics | 1924 Summer | |
| Pierre Guilloux | 1920 Summer, 1924 Summer | |
| R. A. M. Guilmart [ Wikidata ] | Art competitions | 1924 Summer | |
| Jonathan Guilmette | Canada | Short track speed skating | 2002 Winter, 2006 Winter | |
| Agberto Guimarães | Brazil | Athletics | 1980 Summer, 1984 Summer, 1988 Summer | |
| Antônio Guimarães | Shooting | 1932 Summer, 1936 Summer, 1948 Summer, 1952 Summer | |
| Bruno Guimarães | Football | 2020 Summer | |
| Darcy Guimarães | Athletics | 1936 Summer | |
| Durval Guimarães | Shooting | 1968 Summer, 1972 Summer, 1976 Summer, 1980 Summer, 1984 Summer | |
| Gabriela Guimarães | Volleyball | 2016 Summer, 2020 Summer, 2024 Summer | |
| Gustavo Guimarães | Water polo | 2016 Summer | |
| Henrique Guimarães | Judo | 1996 Summer, 2000 Summer, 2004 Summer | |
| José Guimarães | Portugal | Fencing | 1992 Summer | |
| José Carlos Guimarães | Angola | Basketball | 1992 Summer, 1996 Summer | |
| Maria Guimarães | Brazil | Swimming | 1976 Summer | |
| Maria Iêda Guimarães | Modern pentathlon | 2020 Summer | |
| Nilo Guimarães | Basketball | 1984 Summer | |
| Oswaldo Guimarães | Handball | 2016 Summer | |
| Plauto Guimarães | Swimming | 1948 Summer | |
| Ricardo Guimarães | Athletics | 1932 Summer | |
| Nadia Guimendego | Central African Republic | Judo | 2024 Summer | |
| Needy Guims | France | Athletics | 1996 Summer, 2000 Summer | |
| Jean Guinard | Art competitions | 1924 Summer | |
| Maurice Guinard | Wrestling | 1924 Summer | |
| Jean-Christophe Guinchard | Switzerland | Triathlon | 2000 Summer | |
| Dante Guindani | Italy | Road cycling | 1920 Summer | |
| Luciana Guindani | Canoe sprint | 1960 Summer | |
| Abdel Moneim El-Guindi | United Arab Republic | Boxing | 1960 Summer | |
| Mohamed El-Guindi | Egypt | Football | 1948 Summer | |
| Brahima Guindo | Mali | Judo | 2000 Summer | |
| Claudio Guindón | Argentina | Rowing | 1984 Summer, 1988 Summer | |
| Cristina Guinea | Spain | Field hockey | 2016 Summer | |
| David Guiney | Ireland | Athletics | 1948 Summer | |
| John Guiney | United States | 1904 Summer | |
| Eusebio Guiñez | Argentina | 1948 Summer | |
| Tom Guinn | Canada | Shooting | 1976 Summer, 1984 Summer | |
| Humphrey Patrick Guinness | Great Britain | Polo | 1936 Summer | |
| Judy Guinness | Fencing | 1932 Summer, 1936 Summer | |
| Georges Guiot [ Wikidata ] | France | Artistic gymnastics | 1908 Summer | |
| José Güipe | Venezuela | Rowing | 2020 Summer | |
| Charles Guiraist | France | Sailing | 1900 Summer | |
| Arella Guirantes | Puerto Rico | Basketball | 2024 Summer | |
| Liliana Guiscardo | Argentina | Swimming | 2008 Summer | |
| Matthew Guise-Brown | South Africa | Field hockey | 2020 Summer, 2024 Summer | |
| Jean-Jacques Guissart | France | Rowing | 1952 Summer | |
| René Guissart | 1952 Summer, 1956 Summer | |
| Enrique Guittens | Venezuela | Weightlifting | 1960 Summer | |
| Jack Guittet | France | Fencing | 1960 Summer, 1964 Summer | |
| Alex Güity | Honduras | Football | 2020 Summer | |
| José Güity | 2008 Summer | |
| Lasha Gujejiani | Georgia | Judo | 2004 Summer, 2008 Summer | |
| Henry Gujer | Switzerland | Basketball | 1948 Summer | |
| Aleksandr Gukov | Belarus | Swimming | 1996 Summer, 2000 Summer | |
| Nepes Gukulow | Turkmenistan | Wrestling | 2000 Summer | |
| Muhammad Gul | Pakistan | 1984 Summer | |
| Ramazan Gül | Turkey | Boxing | 1988 Summer | |
| Yekta Yılmaz Gül | Wrestling | 2004 Summer | |
| László Gula | Hungary | Boxing | 1968 Summer | |
| Leonardo Gula | Argentina | 1936 Summer | |
| George Gulack | United States | Artistic gymnastics | 1932 Summer | |
| Mária Gulácsy | Hungary | Fencing | 1968 Summer | |
| Nikola Gulan | Serbia | Football | 2008 Summer | |
| Bora Gulari | United States | Sailing | 2016 Summer | |
| Ingrid Gulbin | Germany, East Germany | Diving | 1960 Summer, 1964 Summer, 1968 Summer | |
| Ernests Gulbis | Latvia | Tennis | 2008 Summer | |
| Bjørn Gulbrandsen | Norway | Ice hockey | 1952 Winter | |
| Bjørn Oscar Gulbrandsen | Ice hockey, Sailing | 1952 Winter, 1956 Summer | |
| Hans Martin Gulbrandsen | Canoe sprint | 1948 Summer, 1952 Summer | |
| Ingrid Gulbrandsen | Figure skating | 1920 Summer | |
| Jan Gulbrandsen | Athletics | 1960 Summer | |
| Karl Gulbrandsen | Road cycling | 1912 Summer | |
| Per Gulbrandsen | Rowing | 1920 Summer | |
| Ragnhild Gulbrandsen | Football | 2000 Summer | |
| Solveig Gulbrandsen | 2000 Summer, 2008 Summer | |
| Sadi Gülçelik | Turkey | Basketball | 1952 Summer | |
| Bjarne Guldager | Norway | Athletics | 1920 Summer | |
| Holger Guldager | Denmark | Track cycling | 1924 Summer | |
| Mogens Guldberg | Athletics | 1988 Summer | |
| Jesper Guldbrandsen | Field hockey | 1960 Summer | |
| Chas Guldemond | United States | Snowboarding | 2014 Winter | |
| Daniel Guldemont | Belgium | Judo | 1976 Summer | |
| Anton Guldener | Switzerland | Bobsleigh | 1924 Winter | |
| Wolfgang Güldenpfennig | East Germany | Rowing | 1972 Summer, 1976 Summer | |
| Rabia Gülec | Germany | Taekwondo | 2016 Summer | |
| Tahir Güleç | 2016 Summer | |
| Lasha Gulelauri | Georgia | Athletics | 2016 Summer, 2020 Summer | |
| Sibel Güler | Turkey | Taekwondo | 2008 Summer | |
| Şükrü Gülesin | Football | 1948 Summer | |
| Ivan Gulev | Bulgaria | Shooting | 1996 Summer | |
| Spas Gulev | Biathlon | 1992 Winter | |
| Ahmet Gülhan | Turkey | Wrestling | 2008 Summer | |
| Koba Guliashvili | Georgia | 1996 Summer, 2000 Summer | |
| Andrin Gulich | Switzerland | Rowing | 2020 Summer, 2024 Summer | |
| Marie Gülich | Germany | Basketball | 2024 Summer | |
| Faye Gulini | United States | Snowboarding | 2010 Winter, 2014 Winter, 2018 Winter, 2022 Winter | |
| Ekaterina Guliyev | Russia | Athletics | 2012 Summer | |
| Emin Guliyev | Azerbaijan | Swimming | 1996 Summer, 2000 Summer | |
| Ramil Guliyev | Azerbaijan, Turkey | Athletics | 2008 Summer, 2016 Summer, 2020 Summer | |
| Zafar Guliev | Russia | Wrestling | 1996 Summer | |
| Alejandra Gulla | Argentina | Field hockey | 2004 Summer, 2008 Summer | |
| Ragnvald Gullaksen [ Wikidata ] | Norway | Wrestling | 1912 Summer | |
| Lisa Gullberg | Sweden | Sailing | 1992 Summer | |
| Christer Gulldén | Wrestling | 1988 Summer | |
| Isabelle Gulldén | Handball | 2008 Summer, 2012 Summer, 2016 Summer | |
| Tore Gullen | Norway | Cross country skiing | 1980 Winter | |
| Urs Güller | Switzerland | Road cycling | 1992 Summer | |
| Magnus Gullerud | Norway | Handball | 2020 Summer, 2024 Summer | |
| Delmont Gullery | New Zealand | Rowing | 1932 Summer | |
| Anita Gulli | Italy | Alpine skiing | 2022 Winter | |
| Johan Gullichsen | Finland | Sailing | 1964 Summer | |
| Geir Gulliksen | Norway | Equestrian jumping | 2008 Summer, 2020 Summer | |
| Kevin Gulliksen | Handball | 2020 Summer | |
| Rune Gulliksen | Ice hockey | 1988 Winter, 1992 Winter | |
| Victoria Gulliksen | Equestrian jumping | 2024 Summer | |
| Stein Erik Gullikstad | Nordic combined | 1976 Winter | |
| Bill Gulliver | Rhodesia | Shooting | 1960 Summer | |
| Gary Gullock | Australia | Rowing | 1984 Summer | |
| Christer Gullstrand | Sweden | Athletics | 1980 Summer, 1984 Summer | |
| Emma Gullstrand | Diving | 2020 Summer | |
| Siripuch Gulnoi | Thailand | Weightlifting | 2012 Summer, 2016 Summer | |
| Krista Guloien | Canada | Rowing | 2008 Summer, 2012 Summer | |
| Loreta Gulotta | Italy | Fencing | 2016 Summer | |
| Alisher Gulov | Tajikistan | Taekwondo | 2012 Summer | |
| Leonid Gulov | Estonia | Rowing | 2000 Summer, 2004 Summer | |
| József Gulrich | Hungary | Swimming | 1964 Summer | |
| Martha Gultom | Indonesia | 1956 Summer | |
| Ákos Gulyás | Hungary | 1964 Summer | |
| Éva Gulyás | Basketball | 1980 Summer | |
| Ildikó Gulyás | 1980 Summer | |
| Magdolna Gulyás | 1980 Summer | |
| Michelle Gulyás | Modern pentathlon | 2020 Summer, 2024 Summer | |
| Péter Gulyás | Handball | 2012 Summer | |
| Rick Gulyas | Canada | Ski jumping | 1972 Winter | |
| Erzsébet Gulyás-Köteles | Hungary | Artistic gymnastics | 1948 Summer, 1952 Summer, 1956 Summer | |
| Boris Gulyayev | Soviet Union | Speed skating | 1964 Winter | |
| Nikolay Gulyayev | Soviet Union, Unified Team | 1988 Winter, 1992 Winter | |
| Vadim Gulyayev | Soviet Union | Water polo | 1968 Summer, 1972 Summer | |
| Yelena Gulyayeva | Russia | Athletics | 1996 Summer | |
| Ieva Gumbs | Lithuania | 2024 Summer | |
| Mikhail Gumenyak | Ukraine | Cross country skiing | 2006 Winter | |
| Margitta Gummel | Germany, East Germany | Athletics | 1964 Summer, 1968 Summer, 1972 Summer | |
| Beate Gummelt | Germany | 1992 Summer, 1996 Summer, 2000 Summer | |
| Carissa Gump | United States | Weightlifting | 2008 Summer | |
| Max Gumpel | Sweden | Swimming, Water polo | 1908 Summer, 1912 Summer, 1920 Summer | |
| Andreas Gumpold | Austria | Cross country skiing | 1984 Winter | |
| Josef Gumpold | Germany | Nordic combined | 1936 Winter | |
| Arantza Gumucio | Chile | Sailing | 2016 Summer | |
| Begoña Gumucio | 2016 Summer | |
| Esra Gümüş | Turkey | Volleyball | 2012 Summer | |
| Samet Gümüş | Boxing | 2024 Summer | |
| Hernán Gumy | Argentina | Tennis | 1996 Summer | |
| Bediha Gün | Turkey | Wrestling | 2016 Summer | |
| Kristrún Guðnadóttir [ Wikidata ] | Iceland | Cross country skiing | 2022 Winter | |
| Rajalingam Gunaratnam | Malaysia | Athletics | 1968 Summer | |
| John Gunawan | Indonesia | Sailing | 1968 Summer | |
| Rudy Gunawan | Badminton | 1992 Summer, 1996 Summer | |
| Suryadi Gunawan | Wrestling | 1988 Summer | |
| Tony Gunawan | Indonesia, United States | Badminton | 2000 Summer, 2012 Summer | |
| Sunil Gunawardene | Sri Lanka | Athletics | 1972 Summer | |
| Damla Günay | Turkey | Archery | 2004 Summer | |
| Dilara Buse Günaydın | Swimming | 2008 Summer, 2012 Summer | |
| Saida Gunba | Soviet Union | Athletics | 1980 Summer | |
| Stoyan Gunchev | Bulgaria | Volleyball | 1980 Summer | |
| Vladimir Gundartsev | Soviet Union | Biathlon | 1968 Winter | |
| Otryadyn Gündegmaa | Mongolia | Shooting | 1996 Summer, 2000 Summer, 2004 Summer, 2008 Summer, 2012 Summer, 2016 Summer, 2020 Summer | |
| Tsagaandorjiin Gündegmaa | Artistic gymnastics | 1964 Summer, 1968 Summer | |
| Cai Gundelach | Denmark | Equestrian eventing | 1928 Summer | |
| Alfred Gundersen | Norway | Wrestling | 1912 Summer | |
| Bjørn Gundersen | Athletics | 1948 Summer, 1952 Summer | |
| Carl Gunnar Gundersen | Ice hockey | 1992 Winter | |
| Christopher Gundersen | Sailing | 2008 Summer | |
| Einar Gundersen | Football | 1920 Summer | |
| Einar Gundersen | Wrestling | 1976 Summer | |
| Finn Gundersen | Ice hockey | 1952 Winter | |
| Georg Gundersen | Denmark | Wrestling | 1924 Summer | |
| Gunder Gundersen | Norway | Nordic combined | 1960 Winter | |
| Gunnar Gundersen | Swimming | 1976 Summer | |
| Jacob Gundersen | Wrestling | 1908 Summer | |
| Kaare Gundersen | Boxing | 1948 Summer | |
| Tor Gundersen | Ice hockey | 1964 Winter, 1968 Winter | |
| Trude Gundersen | Taekwondo | 2000 Summer | |
| Foluke Gunderson | United States | Volleyball | 2012 Summer, 2016 Summer, 2020 Summer | |
| Paul Gunderson | Rowing | 1964 Summer | |
| Ryan Gunderson | Ice hockey | 2018 Winter | |
| Jan Gundersrud [ Wikidata ] | Norway | Shooting | 1988 Summer | |
| Hans Gundhus | Athletics | 1924 Summer | |
| Oscar Gundlach-Pedersen | Denmark | Art competitions | 1924 Summer | |
| Hubert Gundolf | Austria | Speed skating | 1976 Winter | |
| Yılmaz Gündüz | Turkey | Basketball | 1952 Summer | |
| Gülşah Günenç | Swimming | 2004 Summer, 2008 Summer | |
| Alpaslan Güneş | Equestrian jumping | 1956 Summer | |
| Viktoria Zeynep Güneş | Swimming | 2016 Summer, 2020 Summer | |
| Zehra Güneş | Volleyball | 2020 Summer, 2024 Summer | |
| Desislav Gunev | Bulgaria | Athletics | 2008 Summer | |
| Fettah Güney | Turkey | Shooting | 1972 Summer | |
| Ghulam Mohiddin Gunga | Afghanistan | Wrestling | 1960 Summer | |
| Adil Güngör | Turkey | 1956 Summer, 1960 Summer | |
| Hasan Güngör | 1960 Summer, 1964 Summer | |
| Nuray Güngör | Weightlifting | 2020 Summer | |
| Rafet Güngör | Judo | 1976 Summer | |
| Paul Gunia | Germany | Athletics | 1908 Summer | |
| Wolfgang Gunkel | East Germany | Rowing | 1968 Summer, 1972 Summer | |
| Yuri Gunko | Ukraine | Ice hockey | 2002 Winter | |
| Adam Gunn | United States | Athletics | 1904 Summer | |
| Chanda Gunn | Ice hockey | 2006 Winter | |
| Charles Gunn | Great Britain | Athletics | 1920 Summer | |
| Jackie Gunn | Bobsleigh | 2002 Winter, 2006 Winter | |
| Neil Gunn | Canada | Sailing | 1972 Summer | |
| Rachael Gunn | Australia | Breaking | 2024 Summer | |
| Richard Gunn | Great Britain | Boxing | 1908 Summer | |
| Sean Gunn | Zimbabwe | Swimming | 2016 Summer | |
| Erna Sóley Gunnarsdóttir [ Wikidata ] | Iceland | Athletics | 2024 Summer | |
| Carl Gunne | Art competitions | 1936 Summer | |
| Sally Gunnell | Great Britain | Athletics | 1988 Summer, 1992 Summer, 1996 Summer | |
| Roland Gunnesch | Romania | Handball | 1972 Summer, 1976 Summer | |
| Stig-Arne Gunnestad | Norway | Curling | 1998 Winter | |
| Loes Gunnewijk | Netherlands | Road cycling | 2012 Summer | |
| Piet Gunning | Field hockey | 1936 Summer | |
| Haluk Günözgen [ Wikidata ] | Turkey | Road cycling | 1972 Summer | |
| Ella Gunson | New Zealand | Field hockey | 2012 Summer, 2020 Summer | |
| Fritz Gunst | Germany | Water polo | 1928 Summer, 1932 Summer, 1936 Summer | |
| Thomas Gunst | West Germany | Field hockey | 1984 Summer | |
| Ernst von Gunten | Switzerland | Athletics | 1952 Summer | |
| Jules von Gunten | Weightlifting | 1924 Summer | |
| Patrick von Gunten | Ice hockey | 2010 Winter, 2014 Winter | |
| Peter Gunterberg | Sweden | Basketball | 1980 Summer | |
| Jack Günthard | Switzerland | Artistic gymnastics | 1952 Summer | |
| Heinz Günthardt | Tennis | 1988 Summer | |
| Rudolf Günthardt | Equestrian eventing | 1960 Summer | |
| Bert Gunther | Netherlands | Rowing | 1928 Summer | |
| Dettlef Günther | East Germany | Luge | 1976 Winter, 1980 Winter | |
| Doris Günther | Austria | Snowboarding | 2002 Winter, 2006 Winter, 2010 Winter | |
| Ernst Günther | Switzerland | Athletics | 1948 Summer | |
| Jana Günther | Germany | Artistic gymnastics | 1992 Summer | |
| Kelly Gunther | United States | Speed skating | 2014 Winter | |
| Leena Günther | Germany | Athletics | 2012 Summer | |
| Michael Günther | West Germany | Swimming | 1968 Summer, 1972 Summer | |
| Paul Günther | Germany | Diving | 1912 Summer | |
| Roland Günther | West Germany | Track cycling | 1984 Summer | |
| Sabine Günther | Germany | Athletics | 1992 Summer | |
| Silke Günther | Rowing | 2004 Summer | |
| Sarah Günther-Werlein | Football | 2004 Summer | |
| Max Günthör | Volleyball | 2012 Summer | |
| Werner Günthör | Switzerland | Athletics | 1984 Summer, 1988 Summer, 1992 Summer | |
| Michael Güntner | Austria | Ice hockey | 1994 Winter | |
| Guo Ailun | China | Basketball | 2012 Summer, 2016 Summer | |
| Guo Chengjiang | Speed skating | 1980 Winter | |
| Guo Chunfang | Athletics | 2000 Summer | |
| Guo Cui | Artistic swimming | 1996 Summer | |
| Guo Daen | Canoe sprint | 1988 Summer | |
| Guo Dan | Archery | 2008 Summer | |
| Guo Dan | Speed skating | 2018 Winter, 2022 Winter | |
| Guo Dandan | Freestyle skiing | 1998 Winter | |
| Guo Dongling | Cross country skiing | 1998 Winter | |
| Guo Fan | Athletics | 2012 Summer | |
| Guo Hong | Ice hockey | 1998 Winter, 2002 Winter | |
| Guo Huaying | Swimming | 1984 Summer | |
| Jessica Guo | Canada | Fencing | 2020 Summer, 2024 Summer | |
| Guo Jia | China | Softball | 2004 Summer, 2008 Summer | |
| Guo Jianli | Modern pentathlon | 2016 Summer | |
| Guo Jie | Athletics | 1936 Summer | |
| Guo Jingjing | Diving | 1996 Summer, 2000 Summer, 2004 Summer, 2008 Summer | |
| Guo Kang | Rowing | 2008 Summer | |
| Guo Lei | Judo | 2008 Summer | |
| Guo Li | Artistic swimming | 2016 Summer, 2020 Summer | |
| Guo Lili | Ice hockey | 1998 Winter | |
| Guo Linlin | Rowing | 2020 Summer | |
| Guo Linxian | Artistic gymnastics | 1988 Summer | |
| Guo Linyao | 1992 Summer | |
| Guo Longchen | Road cycling | 1988 Summer | |
| Guo Mei | Rowing | 1988 Summer | |
| Guo Peng | Volleyball | 2008 Summer | |
| Guo Qiqi | Rhythmic gymnastics | 2020 Summer, 2024 Summer | |
| Guo Shasha | 1992 Summer | |
| Guo Shiqiang | Basketball | 2000 Summer, 2004 Summer | |
| Guo Shuang | Track cycling | 2008 Summer, 2012 Summer | |
| Guo Wei | Ice hockey | 1998 Winter | |
| Guo Wei | Short track speed skating | 2002 Winter | |
| Guo Weiyang | Artistic gymnastics | 2012 Summer | |
| Guo Wenjun | Shooting | 2008 Summer, 2012 Summer, 2016 Summer | |
| Guo Xinghong | Road cycling | 1996 Summer | |
| Guo Xinxin | Freestyle skiing | 2002 Winter, 2006 Winter, 2010 Winter | |
| Guo Yijun | Football | 1988 Summer | |
| Guo Yiqi | Fencing | 2020 Summer | |
| Guo Youhua | Baseball | 2008 Summer | |
| Guo Yue | Table tennis | 2004 Summer, 2008 Summer, 2012 Summer | |
| Guo Yufang | Track cycling | 2024 Summer | |
| Guo Zhendong | Badminton | 2008 Summer, 2012 Summer | |
| Guo Zhengxin | Figure skating | 1998 Winter | |
| Boniface Guobadia | Nigeria | Athletics | 1952 Summer | |
| Guðmundur Guðmundsson | Iceland | Alpine skiing | 1948 Winter | |
| Abhinn Shyam Gupta | India | Badminton | 2004 Summer | |
| Gupta Bahadur | Cross country skiing | 2006 Winter | |
| Brendan Guraliuk | Canada | Field hockey | 2020 Summer | |
| Adalbert Gurath Jr. | Romania | Fencing | 1960 Summer | |
| Adalbert Gurath Sr. | 1952 Summer | |
| Aisha Gurbanli | Azerbaijan | Judo | 2020 Summer | |
| Anna Gurbanova | Rhythmic gymnastics | 2004 Summer | |
| Eduardo Gurbindo | Spain | Handball | 2012 Summer, 2020 Summer | |
| Gurbir Singh Sandhu | India | Shooting | 1976 Summer | |
| Fethi Gürcan | Turkey | Equestrian eventing | 1956 Summer | |
| Kemal Arda Gürdal | Swimming | 2012 Summer | |
| Macit Gürdal | Football | 1952 Summer | |
| Arif Gürdenlı | Sailing | 1992 Summer | |
| Ranjit Singh Gurdit | Malaysia | Field hockey | 1964 Summer | |
| Katelin Guregian | United States | Rowing | 2016 Summer, 2020 Summer | |
| Nareg Guregian | 2016 Summer | |
| Lorena Guréndez | Spain | Rhythmic gymnastics | 1996 Summer, 2000 Summer | |
| Ümitcan Güreş | Turkey | Swimming | 2020 Summer | |
| Gizem Güreşen | Volleyball | 2012 Summer | |
| Nikola Ǵuretanoviḱ | North Macedonia | Swimming | 2024 Summer | |
| Boris Gurevich | Soviet Union | Wrestling | 1952 Summer | |
| Boris Gurevich | 1968 Summer | |
| Lyudmila Gureyeva | Volleyball | 1964 Summer | |
| Mehmet Gürgen | Turkey | Boxing | 1992 Summer | |
| Lyuben Gurgushinov | Bulgaria | Athletics | 1964 Summer | |
| Elis Guri | Albania, Bulgaria | Wrestling | 2008 Summer, 2012 Summer, 2016 Summer | |
| Qëndrim Guri | Kosovo | Road cycling | 2016 Summer | |
| György Gurics | Hungary | Wrestling | 1952 Summer, 1956 Summer, 1960 Summer | |
| Lyubov Gurina | Soviet Union, Unified Team | Athletics | 1988 Summer, 1992 Summer | |
| Gréta Gurisatti | Hungary | Water polo | 2020 Summer, 2024 Summer | |
| Cevat Gürkan | Turkey | Equestrian jumping | 1936 Summer | |
| Pavel Gurkin | Russia | Shooting | 2008 Summer | |
| Alexey Gurman | Kazakhstan | Diving | 2000 Summer | |
| Hilda Gurney | United States | Equestrian dressage | 1976 Summer, 1984 Summer | |
| Andrey Gurov | Kazakhstan | Shooting | 2004 Summer | |
| József Gurovits | Hungary | Canoe sprint | 1952 Summer | |
| Donna Gurr | Canada | Swimming | 1972 Summer | |
| Mark Gurr | Zimbabwe | Tennis | 1988 Summer | |
| Yuli Gurriel | Cuba | Baseball | 2004 Summer, 2008 Summer | |
| Eva Gurrola | Mexico | Weightlifting | 2016 Summer | |
| Emilio Gurruchaga | Spain | Sailing | 1960 Summer | |
| Siegfried Gurschler | Austria | Shooting | 1952 Summer | |
| Daniel Gürschner | Germany | Judo | 2000 Summer | |
| Herbert Gurschner | Great Britain | Art competitions | 1948 Summer | |
| Louisa Gurski | Canoe sprint | 2012 Summer, 2016 Summer | |
| Bedri Gürsoy | Turkey | Football | 1924 Summer | |
| Hüseyin Gürsoy | Wrestling | 1968 Summer | |
| Olivia Gürth | Germany | Athletics | 2024 Summer | |
| Hiltrud Gürtler | West Germany | Rowing | 1976 Summer | |
| Georgiy Gurtsiev [ Wikidata ] | Independent Olympians | Taekwondo | 2024 Summer | |
| Lasha Guruli | Georgia | Boxing | 2024 Summer | |
| Dilip Gurumurthy | India | Basketball | 1980 Summer | |
| Chitra Bahadur Gurung | Nepal | Swimming | 2000 Summer | |
| Jodha Gurung | Athletics | 1984 Summer | |
| Nishma Gurung | Swimming | 1996 Summer | |
| Ram Prasad Gurung | Boxing | 1964 Summer | |
| Sirish Gurung | Swimming | 2016 Summer | |
| Lyudmila Guryeva | Kazakhstan | Biathlon | 1998 Winter | |
| Polina Guryeva | Turkmenistan | Weightlifting | 2020 Summer | |
| Yelena Guryeva | Soviet Union | Field hockey | 1980 Summer | |
| Alexei Guryshev | Ice hockey | 1956 Winter | |
| Nikolay Gusakov | Nordic combined | 1956 Winter, 1960 Winter, 1964 Winter | |
| Maria Gusakova | Cross country skiing | 1960 Winter, 1964 Winter | |
| Alexei Gusarov | Soviet Union, Russia | Ice hockey | 1988 Winter, 1998 Winter | |
| Rokas Guščinas | Lithuania | Artistic gymnastics | 2012 Summer | |
| Bernd Guse | West Germany | Canoe sprint | 1968 Summer, 1972 Summer | |
| Bruno Guse | Germany | Boxing | 1960 Summer, 1964 Summer | |
| Udo Guse | Weightlifting | 1992 Summer | |
| Jens Gusek | East Germany | Fencing | 1988 Summer | |
| Valentino Guseli | Australia | Snowboarding | 2022 Winter | |
| Ilona Gusenbauer | Austria | Athletics | 1968 Summer, 1972 Summer | |
| Gheorghe Gușet | Romania | 1992 Summer, 2000 Summer, 2004 Summer | |
| Aleksandr Gusev | Soviet Union | Field hockey | 1980 Summer | |
| Alexander Gusev | Ice hockey | 1976 Winter | |
| Eduard Gusev | Track cycling | 1956 Summer | |
| Nikita Gusev | Russian Olympic Committee | Ice hockey | 2018 Winter, 2022 Winter | |
| Oleg Gusev | Canoe sprint | 2020 Summer | |
| Sergey Gusev | Soviet Union | Swimming | 1968 Summer | |
| Anna Guseva | Russia | Marathon swimming | 2012 Summer | |
| Elina Guseva | Soviet Union, Unified Team | Handball | 1988 Summer, 1992 Summer | |
| Klara Guseva | Soviet Union | Speed skating | 1960 Winter, 1964 Winter | |
| Natalia Guseva | Russia | Biathlon | 2006 Winter | |
| Vadim Gusevas | Lithuania | Cross country skiing | 2002 Winter | |
| Stephan Güsgen | West Germany | Swimming | 1988 Summer | |
| Georgy Gushchenko | Soviet Union | Rowing | 1952 Summer, 1956 Summer | |
| Aleksey Gushchin | Shooting | 1960 Summer | |
| Eduard Gushchin | Athletics | 1968 Summer | |
| Yuliya Gushchina | Russia | 2008 Summer, 2012 Summer | |
| Viktor Gushchinskiy | 2004 Summer | |
| Lidiya Gusheva | Bulgaria | 1980 Summer | |
| Kōji Gushiken | Japan | Artistic gymnastics | 1984 Summer | |
| Kosei Gushiken | Athletics | 1972 Summer | |
| Brad Gushue | Canada | Curling | 2006 Winter, 2022 Winter | |
| Tatiana Gusin | Greece | Athletics | 2024 Summer | |
| Ravil Gusmanov | Russia | Ice hockey | 1994 Winter | |
| Rebeca Gusmão | Brazil | Swimming | 2004 Summer | |
| Vanessa Gusméroli | France | Figure skating | 1998 Winter, 2002 Winter | |
| Yury Gusov | Soviet Union | Wrestling | 1972 Summer | |
| René Gusperti | Italy | Swimming | 1992 Summer, 1996 Summer | |
| Efrain Gusquiza | Peru | Weightlifting | 1968 Summer | |
| Alistair Guss | Australia | Alpine skiing | 1984 Winter | |
| Antony Guss | 1980 Winter | |
| Lloyd Guss | Canada | Athletics, Bobsleigh | 1984 Summer, 1988 Winter | |
| Marilla Guss | Australia | Alpine skiing | 1984 Winter | |
| Oliver Gussenberg | Germany | Judo | 2000 Summer, 2004 Summer | |
| P. Gussmann | United States | Artistic gymnastics | 1904 Summer | |
| Reinhard Gust | East Germany | Rowing | 1972 Summer | |
| Prince Gustaf Adolf, Duke of Västerbotten | Sweden | Equestrian jumping | 1936 Summer | |
| Fathur Gustafian | Indonesia | Shooting | 2024 Summer | |
| Eygló Ósk Gústafsdóttir | Iceland | Swimming | 2012 Summer, 2016 Summer | |
| Bengt Gustafson | Sweden | Volleyball | 1988 Summer | |
| Elisabet Gustafson | Curling | 1998 Winter, 2002 Winter | |
| Jonathan Gustafson | United States | Luge | 2022 Winter | |
| Megan Gustafson | Spain | Basketball | 2024 Summer | |
| Tomas Gustafson | Sweden | Speed skating | 1980 Winter, 1984 Winter, 1988 Winter, 1992 Winter | |
| Anders Gustafsson | Canoe sprint | 2000 Summer, 2004 Summer, 2008 Summer, 2012 Summer | |
| August Gustafsson | Tug of war | 1912 Summer | |
| Aulo Gustafsson | Swimming | 1928 Summer | |
| Bengt-Åke Gustafsson | Ice hockey | 1992 Winter | |
| Birger Gustafsson | Sailing | 1908 Summer | |
| Bo Gustafsson | Athletics | 1980 Summer, 1984 Summer, 1988 Summer | |
| Christina Gustafsson | Shooting | 1984 Summer | |
| Emil Gustafsson [ Wikidata ] | 1912 Summer | |
| Erik Gustafsson | Finland | Athletics | 1972 Summer | |
| Erik Gustafsson | Sweden | Ice hockey | 2018 Winter | |
| Erkki Gustafsson | Finland | Football | 1936 Summer | |
| Fredrik Gustafsson | Sweden | Bobsleigh | 1994 Winter | |
| Helge Gustafsson | Artistic gymnastics | 1920 Summer | |
| Janne Gustafsson | Shooting | 1908 Summer | |
| Karl Gustafsson | Football | 1908 Summer, 1912 Summer, 1920 Summer | |
| Lars Gustafsson | Wrestling | 1988 Summer | |
| Lars-Eric Gustafsson | Rowing | 1960 Summer | |
| Lars-Erik Gustafsson | Athletics | 1964 Summer | |
| Linda Gustafsson | Ice hockey | 1998 Winter | |
| Madeleine Gustafsson | Handball | 2008 Summer | |
| Magnus Gustafsson | Tennis | 1992 Summer, 1996 Summer | |
| Malin Gustafsson | Ice hockey | 1998 Winter | |
| Margareta Gustafsson | Shooting | 1984 Summer | |
| Marianne Gustafsson | Swimming | 1928 Summer | |
| Mats Gustafsson [ Wikidata ] | Road cycling | 1980 Summer | |
| Mattias Gustafsson | Handball | 2012 Summer | |
| Ragnar Gustafsson | Equestrian eventing | 1960 Summer | |
| Rolf Gustafsson | Boxing | 1928 Summer | |
| Thomas Gustafsson | Bobsleigh | 1972 Winter | |
| Tina Gustafsson | Swimming | 1980 Summer | |
| Toini Gustafsson | Cross country skiing | 1964 Winter, 1968 Winter | |
| Tore Gustafsson | Athletics | 1988 Summer, 1992 Summer, 1996 Summer | |
| Ulf Gustafsson | Rowing | 1960 Summer | |
| Abby Gustaitis | United States | Rugby sevens | 2020 Summer | |
| Renata Gustaitytė | Lithuania | Athletics | 2000 Summer | |
| Felipe Gustavo | Brazil | Skateboarding | 2020 Summer, 2024 Summer | |
| Roseli Gustavo | Basketball | 1996 Summer | |
| Jan Erik Gustavsen | Norway | Road cycling | 1968 Summer | |
| Linda Gustavson | United States | Swimming | 1968 Summer | |
| Bengt Gustavsson | Sweden | Football | 1952 Summer | |
| Björgvin Páll Gústavsson | Iceland | Handball | 2008 Summer, 2012 Summer | |
| Carina Gustavsson | Sweden | Rowing | 1984 Summer, 1988 Summer | |
| Erik Gustavsson | Cross country skiing | 1980 Winter | |
| Ingrid Gustavsson | Swimming | 1968 Summer | |
| Jonas Gustavsson | Ice hockey | 2010 Winter | |
| Karl-Johan Gustavsson | Wrestling | 1984 Summer | |
| Martin Gustavsson | Swimming | 2000 Summer, 2004 Summer | |
| Gustav Gustenau | Austria | Modern pentathlon | 2020 Summer | |
| Bridgette Gusterson | Australia | Water polo | 2000 Summer | |
| Maxim Gustik | Belarus | Freestyle skiing | 2018 Winter, 2022 Winter | |
| Marcel Gustin | Belgium | Athletics | 1920 Summer | |
| Ronan Gustin | France | Fencing | 2020 Summer | |
| Valentina Gustin | Croatia | Shooting | 2016 Summer | |
| Agnese Gustmane | Latvia | Tennis | 1992 Summer | |
| Gerhard Gustmann | Germany | Rowing | 1936 Summer | |
| Volodymir Gustov | Ukraine | Road cycling | 2000 Summer | |
| Hans Gut | Switzerland | Sailing | 1972 Summer | |
| Karel Gut | Czechoslovakia | Ice hockey | 1952 Winter, 1956 Winter, 1960 Winter | |
| Zbigniew Gut | Poland | Football | 1972 Summer | |
| Lara Gut-Behrami | Switzerland | Alpine skiing | 2014 Winter, 2018 Winter, 2022 Winter | |
| Les Gutches | United States | Wrestling | 1996 Summer | |
| Eddi Gutenkauf | Luxembourg | Fencing | 1960 Summer | |
| Katharina Gutensohn | Germany, Austria | Alpine skiing, Freestyle skiing | 1992 Winter, 1994 Winter, 1998 Winter, 2010 Winter | |
| Jolanio Guterres [ Wikidata ] | Timor-Leste | Swimming | 2024 Summer | |
| Lionel Guterres | Hong Kong | Field hockey | 1964 Summer | |
| Alfred Guth | Austria | Modern pentathlon | 1936 Summer | |
| Fernand Guth | Luxembourg | Football | 1952 Summer | |
| Guillaume Guth [ Wikidata ] | France | Swimming | 2024 Summer | |
| Thorstein Guthe | Norway | Fencing | 1936 Summer | |
| Karin Guthke | East Germany | Diving | 1976 Summer, 1980 Summer | |
| George Guthrie | United States | Athletics | 1924 Summer | |
| Diane Guthrie-Gresham | Jamaica | 1992 Summer, 1996 Summer | |
| Jennifer Gutiérrez Bermejo | Spain | Handball | 2020 Summer, 2024 Summer | |
| Allan Gutiérrez Castro | Honduras | Swimming | 2012 Summer, 2016 Summer | |
| Javier Gutiérrez Cuevas | Spain | Cross country skiing | 2010 Winter, 2014 Winter | |
| Juan Jesús Gutiérrez Cuevas | 1992 Winter, 1994 Winter, 1998 Winter, 2002 Winter, 2006 Winter | |
| Adair Prieto | Mexico | Cycling mountain bike | 2024 Summer | |
| Ana Gutiérrez | Virgin Islands | Athletics | 1992 Summer | |
| Arturo Gutiérrez | Mexico | Judo | 1996 Summer | |
| Augusto Gutiérrez | Venezuela | Fencing | 1952 Summer, 1960 Summer | |
| Carlos Gutiérrez | Mexico | Football | 1964 Summer | |
| Diego Gutiérrez | Argentina | Volleyball | 2004 Summer | |
| Eddy Gutiérrez | Cuba | Athletics | 1976 Summer | |
| Elias Gutiérrez | Colombia | 1936 Summer | |
| Érick Gutiérrez | Mexico | Football | 2016 Summer | |
| Florencia Gutiérrez | Argentina | Sailing | 2008 Summer | |
| Francisco Gutiérrez | Colombia | Athletics | 1964 Summer | |
| Giancarlo Gutierrez | Italy | Equestrian eventing | 1956 Summer | |
| Gualberto Gutiérrez | Uruguay | Boxing | 1960 Summer | |
| Guillermo Gutiérrez | Venezuela | Athletics | 1952 Summer | |
| Guillermo Gutiérrez | Mexico | Road cycling | 1984 Summer, 1988 Summer | |
| Gustavo Gutiérrez | Venezuela | Fencing | 1952 Summer | |
| Gustavo Gutiérrez | Ecuador | Athletics | 1968 Summer | |
| Henri Gutierrez [ Wikidata ] | France | 1908 Summer | |
| Hernán Gutiérrez | Colombia | Boxing | 1984 Summer | |
| Humberto Gutiérrez | Mexico | Field hockey | 1968 Summer | |
| Ignacio Gutiérrez | Swimming | 1932 Summer | |
| Israel Gutierrez [ Wikidata ] | El Salvador | Shooting | 2024 Summer | |
| Iván Gutiérrez | Spain | Road cycling | 2004 Summer | |
| Jennifer Gutierrez | United States | Triathlon | 2000 Summer | |
| Jorge Gutiérrez | Cuba | Boxing | 2000 Summer | |
| José Gutiérrez | Venezuela | Sailing | 2016 Summer | |
| Juan Jesús Gutiérrez | Mexico | Athletics | 1992 Summer | |
| Juan Pedro Gutiérrez | Argentina | Basketball | 2008 Summer, 2012 Summer | |
| Julia Gutiérrez | Mexico | Rhythmic gymnastics | 2024 Summer | |
| Julián Gutiérrez [ Wikidata ] | Argentina | Shooting | 2024 Summer | |
| Karla Gutiérrez | Mexico | Sailing | 1992 Summer | |
| Leonardo Gutiérrez | Argentina | Basketball | 2004 Summer, 2008 Summer, 2012 Summer | |
| Long Gutiérrez | Mexico | Swimming | 2016 Summer | |
| Magdiel Gutiérrez | Nicaragua | Wrestling | 1992 Summer | |
| Manuel Gutiérrez | Panama | Swimming | 1984 Summer, 1988 Summer | |
| Miguel Gutiérrez | Spain | Football | 2024 Summer | |
| Mireia Gutiérrez | Andorra | Alpine skiing | 2010 Winter, 2014 Winter, 2018 Winter | |
| Nancy Gutiérrez | Mexico | Football | 2004 Summer | |
| Noel Gutiérrez | Field hockey | 1968 Summer, 1972 Summer | |
| Pascual Gutiérrez | Athletics | 1936 Summer | |
| Rocío Gutiérrez | Spain | Field hockey | 2016 Summer | |
| Rosa Gutiérrez | Mexico | Diving | 1948 Summer | |
| Saúl Gutiérrez | Taekwondo | 2016 Summer | |
| Teófilo Gutiérrez | Colombia | Football | 2016 Summer | |
| Tomás Gutiérrez | Puerto Rico | Basketball | 1964 Summer, 1968 Summer | |
| Tonatiuh Gutiérrez | Mexico | Swimming | 1948 Summer, 1952 Summer | |
| Łukasz Gutkowski | Poland | Modern pentathlon | 2020 Summer, 2024 Summer | |
| Piotr Gutman | Boxing | 1964 Summer | |
| Ernests Gūtmanis | Latvia | 1924 Summer | |
| Egon Gutmann | Germany | Art competitions | 1936 Summer | |
| Lara Naki Gutmann | Italy | Figure skating | 2022 Winter | |
| Wojciech Gutorski | Poland | Rowing | 2004 Summer, 2008 Summer, 2012 Summer | |
| Bob Gutowski | United States | Athletics | 1956 Summer | |
| Jacek Gutowski | Poland | Weightlifting | 1988 Summer | |
| Michał Gutowski | Equestrian jumping | 1936 Summer | |
| Gatis Gūts | Latvia | Bobsleigh | 2002 Winter, 2006 Winter | |
| Torsten Gutsche | Germany | Canoe sprint | 1992 Summer, 1996 Summer | |
| Tatiana Gutsu | Unified Team | Artistic gymnastics | 1992 Summer | |
| Romuald Gutt | Poland | Art competitions | 1936 Summer | |
| Jwala Gutta | India | Badminton | 2012 Summer, 2016 Summer | |
| Claire Guttenstein | Belgium | Swimming | 1912 Summer | |
| Jeff Gutteridge | Great Britain | Athletics | 1976 Summer, 1984 Summer | |
| Albert Gutterson | United States | 1912 Summer | |
| August Güttinger | Switzerland | Artistic gymnastics | 1924 Summer, 1928 Summer | |
| John Güttke | Sweden | Biathlon | 1964 Winter | |
| Károly Güttler | Hungary | Swimming | 1988 Summer, 1992 Summer, 1996 Summer, 2000 Summer | |
| Béla Guttmann | Football | 1924 Summer | |
| David Guttman | Sweden | Athletics | 1912 Summer | |
| Wilhelm Guttmann | Germany | Art competitions | 1932 Summer | |
| Oscar Guttormsen | Norway | Athletics | 1908 Summer | |
| Per Willy Guttormsen | Speed skating | 1968 Winter, 1972 Winter | |
| Simen Guttormsen | Athletics | 2024 Summer | |
| Sondre Guttormsen | 2020 Summer, 2024 Summer | |
| Bruno Guttowski | Germany | Ice hockey | 1956 Winter | |
| Andrei Guțu | Moldova | Weightlifting | 2008 Summer | |
| Octavian Guțu | Swimming | 2004 Summer | |
| Jean Gutweniger | Switzerland | Artistic gymnastics | 1924 Summer | |
| Bruno Gutzeit | France | Swimming | 1988 Summer, 1992 Summer | |
| Siegmar Gutzeit | East Germany | Fencing | 1980 Summer | |
| Tilo Gutzeit | Germany | Figure skating | 1956 Winter, 1960 Winter | |
| Vadym Gutzeit | Unified Team, Ukraine | Fencing | 1992 Summer, 1996 Summer, 2000 Summer | |
| Döndü Güvenç | Turkey | Taekwondo | 2000 Summer | |
| Gizem Güvenç | Swimming | 2024 Summer | |
| Tuğba Güvenç | Athletics | 2016 Summer | |
| Pavel Guvorsky [ Wikidata ] | Russia | Fencing | 1912 Summer | |
| Fabrice Guy | France | Nordic combined | 1988 Winter, 1992 Winter, 1994 Winter, 1998 Winter | |
| Francis Guy | Great Britain | Road cycling | 1912 Summer | |
| Gawain Guy | Jamaica | Athletics | 1984 Summer | |
| James Guy | Great Britain | Swimming | 2016 Summer, 2020 Summer, 2024 Summer | |
| Pierre Guy | France | Shooting | 1960 Summer, 1964 Summer | |
| Robert Guy | Trinidad and Tobago | Athletics | 1996 Summer | |
| Ronald Guy | Great Britain | Shooting | 1952 Summer | |
| Alexandre Guyader | France | Sailing | 2000 Summer | |
| Joseph Guyader [ Wikidata ] | Track cycling | 1908 Summer | |
| Hubert Guyard | 1928 Summer | |
| Astrid Guyart | Fencing | 2012 Summer, 2016 Summer, 2020 Summer | |
| Brice Guyart | 2000 Summer, 2004 Summer, 2008 Summer | |
| Andrew Guyda | United States | Football | 1936 Summer | |
| Denis Guye | Great Britain | Rowing | 1928 Summer | |
| Alexandre Guyodo | France | Athletics | 1948 Summer | |
| Adrien Guyon | Fencing | 1900 Summer | |
| Jean-Jacques Guyon | Equestrian eventing | 1968 Summer | |
| Lionel Guyon | 2012 Summer | |
| Bernard Guyot | Road cycling | 1964 Summer | |
| N. Guyot [ Wikidata ] | Shooting | 1900 Summer | |
| René Guyot | Belgium | 1900 Summer | |
| Sarah Guyot | France | Canoe sprint | 2012 Summer, 2016 Summer, 2020 Summer | |
| Sébastienne Guyot | Athletics | 1928 Summer | |
| Jean Van Guysse | Belgium | Artistic gymnastics | 1908 Summer, 1920 Summer | |
| Scott Guyton | New Zealand | Road cycling | 1996 Summer, 2000 Summer | |
| Denton Guy-Williams | Sierra Leone | Athletics | 1992 Summer | |
| Brad Guzan | United States | Football | 2008 Summer | |
| Miroslav Guzdek | Czech Republic | Athletics | 2004 Summer | |
| Ecem Güzel | Turkey | Sailing | 2020 Summer, 2024 Summer | |
| Peter Guzelj | Yugoslavia | Canoe slalom | 1972 Summer | |
| Elisabeta Guzganu-Tufan | Romania | Fencing | 1984 Summer, 1988 Summer, 1992 Summer | |
| Anastasia Guzhenkova | Russian Olympic Committee | Swimming | 2020 Summer | |
| Blanka Guzi | Hungary | Modern pentathlon | 2024 Summer | |
| Julia Guzieva | Russian Olympic Committee | Curling | 2018 Winter | |
| Grzegorz Guzik | Poland | Biathlon | 2014 Winter, 2018 Winter, 2022 Winter | |
| Krystyna Guzik | 2006 Winter, 2010 Winter, 2014 Winter, 2018 Winter | |
| Alejandro Guzmán | Peru | Football | 1960 Summer | |
| Alejandro Guzmán | Mexico | Basketball | 1968 Summer | |
| Alfredo Guzmán | Swimming | 1960 Summer, 1964 Summer | |
| Angel Guzman | Shooting | 1984 Summer | |
| Berenice Guzmán | Artistic swimming | 1996 Summer | |
| Eliazar Guzmán | Chile | Shooting | 1956 Summer | |
| Felipe Guzmán | Mexico | Wrestling | 1996 Summer | |
| Francisco Guzman | Dominican Republic | Weightlifting | 1988 Summer | |
| Jeison Guzmán | Baseball | 2020 Summer | |
| Joan Guzmán | Boxing | 1996 Summer | |
| Jonathan de Guzmán | Netherlands | Football | 2008 Summer | |
| José Guzmán | Peru | Basketball | 1964 Summer | |
| José Guzmán | Venezuela | Boxing | 1992 Summer | |
| José Miguel Guzman | Dominican Republic | Weightlifting | 1988 Summer | |
| Julio Guzman | Puerto Rico | Boxing | 1976 Summer | |
| Lucas Guzmán | Argentina | Taekwondo | 2020 Summer, 2024 Summer | |
| Luis Guzmán | Mexico | Water polo | 1968 Summer | |
| Manuel Guzmán | Puerto Rico | Swimming | 1988 Summer, 1992 Summer | |
| Manuel Guzmán [ Wikidata ] | Dominican Republic | Baseball | 1992 Summer | |
| Raúl Guzmán | Mexico | Swimming | 1960 Summer | |
| Sergio Guzmán | Chile | Athletics | 1948 Summer | |
| Sidney Guzman | Peru | Wrestling | 2004 Summer | |
| Víctor Guzmán | Mexico | Football | 2016 Summer | |
| Violeta Guzmán | Athletics | 2004 Summer | |
| Washington Guzmán | Chile | Swimming | 1936 Summer | |
| Wilfredo Guzman | Puerto Rico | Boxing | 1976 Summer | |
| Yusneylys Guzmán | Cuba | Wrestling | 2020 Summer, 2024 Summer | |
| Aleksandr Guzov | Belarus | 1996 Summer, 2000 Summer | |
| Anna Guzowska | Poland | Athletics | 2004 Summer | |
| Małgorzata Guzowska | 1980 Summer | |
| Giedrius Gužys | Lithuania | Sailing | 2000 Summer, 2004 Summer | |
| Michela Guzzetti | Italy | Swimming | 2012 Summer | |
| Patsy Guzzo | Canada | Ice hockey | 1948 Winter | |
| Chiara Guzzonato | Italy | Basketball | 1980 Summer | |
| Nodar Gvakhariya | Soviet Union | Water polo | 1956 Summer | |
| David Gvantseladze | Wrestling | 1964 Summer | |
| Beka Gviniashvili | Georgia | Judo | 2016 Summer | |
| Oleksandr Gvozdyk | Ukraine | Boxing | 2012 Summer | |
| Gwag Yong-ja | South Korea | Volleyball | 1964 Summer | |
| Gwak Dong-han | Judo | 2016 Summer, 2020 Summer | |
| Kwak Hyun-chae | Basketball | 1968 Summer | |
| Gwak Kyung-keun | Football | 1992 Summer | |
| Kim Gwang-sok [ Wikidata ] | North Korea | 1976 Summer | |
| Jazmon Gwathmey | Puerto Rico | Basketball | 2020 Summer | |
| Edwige Gwend | Italy | Judo | 2012 Summer, 2016 Summer | |
| Josef Gwerder | Switzerland | Athletics | 1968 Summer | |
| Donald Gwinn | United States | 1928 Summer | |
| Giulia Gwinn | Germany | Football | 2024 Summer | |
| Magdalena Gwizdoń | Poland | Biathlon | 2006 Winter, 2010 Winter, 2014 Winter, 2018 Winter | |
| Gwon Han-na | South Korea | Handball | 2012 Summer, 2016 Summer | |
| Gwon Ik-hyeon | Road cycling | 1948 Summer, 1952 Summer | |
| Gwon Sang-won | Swimming | 1988 Summer | |
| Gwon Seong-nak | Athletics | 1988 Summer | |
| Gwon Sun-cheon | Speed skating | 2006 Winter | |
| Gwon Sun-geun | Swimming | 1988 Summer | |
| Horace Gwynne | Canada | Boxing | 1932 Summer | |
| Beatrice Gyaman | Ghana | Athletics | 2016 Summer | |
| Asamoah Gyan | Football | 2004 Summer | |
| Baffour Gyan | 2004 Summer | |
| János Gyáni | Hungary | Judo | 1980 Summer, 1988 Summer | |
| Ileana Gyarfaș | Romania | Artistic gymnastics | 1952 Summer | |
| Andrea Gyarmati | Hungary | Swimming | 1968 Summer, 1972 Summer | |
| Béla Gyarmati | Fencing | 1964 Summer | |
| Dezső Gyarmati | Water polo | 1948 Summer, 1952 Summer, 1956 Summer, 1960 Summer, 1964 Summer | |
| Olga Gyarmati | Athletics | 1948 Summer, 1952 Summer, 1956 Summer | |
| Emanuil Gyaurov | Bulgaria | Basketball | 1960 Summer | |
| Mathias Gydesen | Denmark | Swimming | 2012 Summer | |
| Gyula Gyenes | Hungary | Athletics | 1936 Summer | |
| Leila Gyenesei | Cross country skiing, Modern pentathlon | 2006 Winter, 2008 Summer | |
| Valéria Gyenge | Swimming | 1952 Summer, 1956 Summer | |
| Brian Gyetko | Canada | Tennis | 1992 Summer | |
| Nicolas Gygax | Switzerland | Freestyle skiing | 2018 Winter, 2022 Winter | |
| Aye Maung Gyi | Myanmar | Football | 1972 Summer | |
| Valéria Gyimesi | Hungary | Rowing | 1976 Summer, 1980 Summer | |
| Vilhelm Gylche | Denmark | Athletics | 1912 Summer | |
| George Gyles | Canada | Sailing | 1932 Summer | |
| Gylfi Gylfason | Iceland | Handball | 2004 Summer | |
| Gerhard Gyllenhammar | Sweden | Art competitions | 1936 Summer | |
| Axel Gyllenkrok | Shooting | 1912 Summer | |
| Ebbe Gyllenstierna | Modern pentathlon | 1936 Summer | |
| Axel-Erik Gyllenstolpe | Athletics | 1920 Summer | |
| Jane Gylling | Swimming | 1920 Summer, 1924 Summer | |
| Kate Gynther | Australia | Water polo | 2004 Summer, 2008 Summer, 2012 Summer | |
| Pyon Song Gyong [ Wikidata ] | North Korea | Table tennis | 2024 Summer | |
| Kim Gyong-hui [ Wikidata ] | Road cycling | 1992 Summer | |
| András Gyöngyösi | Hungary | Water polo | 1988 Summer, 1992 Summer, 1996 Summer | |
| László Gyöngyösi | Swimming | 1952 Summer | |
| Anikó Gyöngyössy | Water polo | 2020 Summer | |
| Mihail Gyonin | Bulgaria | Football | 1968 Summer | |
| József Gyönyörű | Hungary | Shooting | 1960 Summer | |
| Lívia Győrbiró | Sailing | 2004 Summer | |
| Anett Györe | Water polo | 2004 Summer, 2008 Summer | |
| Ion Györffi | Romania | Boxing | 1972 Summer | |
| Dóra Győrffy | Hungary | Athletics | 2000 Summer | |
| Imre Győrffy | Track cycling | 1936 Summer | |
| Irén Győrffy | Swimming | 1936 Summer | |
| Sándor Győrffy | Handball | 1992 Summer | |
| Endre Győrfi | Water polo | 1948 Summer | |
| Mónika György | Romania | Cross country skiing | 2006 Winter, 2010 Winter | |
| Réka György | Hungary | Swimming | 2016 Summer | |
| Ferenc Györgyei | Wrestling | 1924 Summer | |
| Károly Győry | Rowing | 1936 Summer | |
| Mario Gyr | Switzerland | 2012 Summer, 2016 Summer | |
| Brigitte Gyr-Gschwend | Road cycling | 1988 Summer | |
| Jean Gysel | Water polo | 1936 Summer | |
| Pieter Gysel | Belgium | Short track speed skating | 2002 Winter, 2006 Winter, 2010 Winter | |
| Brooke Gysen | Australia | Artistic gymnastics | 1992 Summer | |
| Willy Gysi | Switzerland | Handball | 1936 Summer | |
| Rolf Gysin | Athletics | 1972 Summer, 1976 Summer | |
| Knut Gysler | Norway | Equestrian eventing, Equestrian jumping | 1920 Summer, 1928 Summer | |
| Eva Gysling | Switzerland | Swimming | 1984 Summer, 1988 Summer, 1992 Summer | |
| Georg Gyssling | Germany | Bobsleigh | 1932 Winter | |
| Boris Gyuderov | Bulgaria | Volleyball | 1964 Summer | |
| István Gyulai | Hungary | Athletics | 1964 Summer | |
| Márton Gyulai | Bobsleigh | 2002 Winter, 2006 Winter | |
| Mihály Gyulai | Wrestling | 1976 Summer | |
| Miklós Gyulai | Bobsleigh, Athletics | 1994 Winter, 2000 Summer | |
| Ileana Gyulai-Drîmbă-Jenei | Romania | Fencing | 1964 Summer, 1968 Summer, 1972 Summer, 1976 Summer | |
| Zsolt Gyulay | Hungary | Canoe sprint | 1988 Summer, 1992 Summer, 1996 Summer | |
| Arus Gyulbudaghyan | Armenia | Diving | 1996 Summer | |
| Réka Gyurátz | Hungary | Athletics | 2020 Summer, 2024 Summer | |
| Déborah Gyurcsek | Uruguay | 2000 Summer | |
| Gejza Gyurcsi | Slovakia | Water polo | 2000 Summer | |
| József Gyuricza | Hungary | Fencing | 1956 Summer, 1960 Summer, 1964 Summer | |
| János Gyurka | Handball | 1988 Summer | |
| Ferenc Gyurkovics | Weightlifting | 2004 Summer | |
| Spas Gyurov | Bulgaria | Road cycling | 2012 Summer | |
| Ginka Gyurova | Rowing | 1976 Summer, 1980 Summer | |
| Krasimira Gyurova | Basketball | 1976 Summer | |
| Dániel Gyurta | Hungary | Swimming | 2004 Summer, 2008 Summer, 2012 Summer, 2016 Summer | |
| Gergely Gyurta | 2012 Summer, 2016 Summer, 2020 Summer | |
| Kazimierz Gzowski | Poland | Equestrian jumping | 1928 Summer | |