| Abbreviation | Meaning |
|---|
| G | gravidity (total number of pregnancies, successful or not)
guanosine |
| G6PD | glucose-6-phosphate-dehydrogenase |
| GA | general anaesthesia
gestational age |
| GABA | gamma-aminobutyric acid |
| GABHS | group A beta-hemolytic streptococcus |
| GACI | Generalized Arterial Calcification of Infancy |
| GAD | Generalized anxiety disorder |
| GAF | Global Assessment of Functioning |
| GAPS | Guidelines for Adolescent Preventative Services |
| GAS | Group A Streptococcal
General Adaptation Syndrome
Gender Affirming Surgery
Global Assessment Scale |
| GAVE | Gastric antral vascular ectasia |
| GB | gallbladder |
| GBC | Gallbladder carcinoma |
| GBS | group B Strep.
Guillain–Barré syndrome |
| GBM | glioblastoma multiforme
glomerular basement membrane |
| GC | general condition
gonococcus |
| GCA | giant-cell arteritis |
| GCS | Glasgow Coma Scale
Complete Blood Count
Graduated compression stockings |
| GCT | germ cell tumor
glucose challenge test
Giant cell tumor |
| G-CSF | granulocyte colony-stimulating factor |
| GD | gender dysphoria |
| GDA | gastroduodenal artery |
| GDLH | glutamate dehydrogenase |
| GDM | Gestational Diabetes Mellitus |
| GDMT | Guideline Directed Medical Therapy |
| GDP | guanosine diphosphate |
| GDS | Geriatric Depression Scale |
| GERD | gastroesophageal reflux disease |
| GFR | glomerular filtration rate |
| GGT | gamma glutamyl transferase |
| GGTP | gamma glutamyl transpeptidase |
| GH | growth hormone |
| GHRF | growth hormone releasing factor |
| GHRH | growth hormone releasing hormone |
| GI | gastrointestinal;
gastrointestinal tract |
| GIA | A model of surgical staple (GI: Gastro-Intestinal) |
| GIB | gastrointestinal bleed |
| GID | gender identity disorder |
| GIS | GastroIntestinal Surgeon |
| GIFT | gamete intrafallopian transfer |
| GIST | gastrointestinal stromal tumor |
| GIT | gastrointestinal tract |
| GITS | gastrointestinal therapeutic system |
| GLF | ground level fall |
| GMC | general medical condition (e.g., 0 GMC) |
| GM-CSF | granulocyte macrophage colony-stimulating factor |
| GMP | guanosine monophosphate |
| GN | glomerulonephritis |
| GNRH | gonadotropin-releasing hormone |
| GOAT | Galveston Orientation and Amnesia Test |
| GOC | Goals of care |
| GOD | glucose oxidase |
| GOMER | get outta my emergency room |
| GORD | gastro-oesophageal reflux disease |
| GOT | glutamic-oxalacetic transaminase |
| GP | general practitioner
Goodpasture's syndrome |
| GPA | granulomatosis with polyangiitis |
| GPCL | gas permeable contact lens |
| GPT | glutamic-pyruvic transaminase |
| Gr | grain |
| GRAV I | gravidity = 1 (indicating a woman during her first pregnancy) |
| GSW | gunshot wound |
| GTN | glyceryl trinitrate
gestational trophoblastic neoplasia |
| GTT | glucose tolerance test gestational trophoblastic tumor |
| Gtts | guttae (drops) |
| GU | genitourinary
gastric ulcer |
| GUM | genitourinary medicine (often used more restrictively as alternative to sexually transmitted disease clinic) |
| GvH | graft-versus-host |
GvHD,
GVHD | graft-versus-host disease |
| GXT | graded exercise test |
| GYN | gynecology |