+ Sortable table 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 streptococcusGACIGeneralized Arterial Calcification of Infancy GAD Generalized anxiety disorderGAFGlobal Assessment of Functioning GAPS Guidelines for Adolescent Preventative ServicesGASGroup A Streptococcal General Adaptation SyndromeGender 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 GGO ground glass opacification 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 GMFCS gross motor function classification system 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 GTCS generalised tonic-clonic seizure 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