China 
Africa 
- GTPase-activating proteins
- GTPases
- GTS-21
- GUCH
- GV
- GVAX
- GW501516
- GWAS
- GYKI 52466
- Gabaculine
- Gabapentin
- Gabapentinoids
- Gabazine
- Gabexate
- Gaboxadol
- Gabra5
- Gabrb3
- Gabrd
- Gabrg3
- Gac
- Gacyclidine
- Gadd45
- Gadodiamide
- Gadolinium
- Gadopentetic acid
- Gagging
- Gain of function mutation
- Gain-of-function research
- Gait
- Gait abnormality
- Gait analysis
- Gait apraxia
- Gait belt
- Gaiters
- Galactagogues
- Galactan
- Galactitol
- Galactocele
- Galactocerebroside
- Galactocoele
- Galactokinase
- Galactolipids
- Galactomannan
- Galactooligosaccharide
- Galactooligosaccharides
- Galactorrhea
- Galactosamine
- Galactose
- Galactose 1 phosphate uridyltransferase
- Galactose 1-phosphate
- Galactose oxidase
- Galactose-1-phosphate uridylyltransferase
- Galactosemia
- Galactosidase
- Galactosidases
- Galactosylceramidase
- Galactosylceramide
- Galactosyltransferase
- Galangal
- Galangin
- Galanin
- Galantamine
- Galanthus
- Galaxy
- Galbraith plot
- Galc
- Galcanezumab
- Galea aponeurotica
- Galeazzi fracture
- Galectin
- Galectin 3
- Galega officinalis
- Galegine
- Galenic formulation
- Galeterone
- Galidesivir
- Gall bladder
- Gall bladder cancer
- Gall bladder disease
- Gallamine triethiodide
- Gallbladder
- Gallbladder cancer
- Gallbladder carcinoma
- Gallbladder disease
- Gallbladder drainage
- Gallbladder polyp
- Galli-Galli disease
- Gallic acid
- Gallium
- Gallium 68
- Gallium arsenide
- Gallium nitride
- Gallocatechin gallate
- Gallocatechol
- Gallop rhythm
- Gallstone ileus
- Gallstone pancreatitis
- Gallstones
- Galvanic skin response
- Galvanism
- Galveston Orientation and Amnesia Test
- Gambier
- Gambling
- Gambling addiction
- Gambogic acid
- Game animals
- Gamete intrafallopian transfer
- Gametes
- Gametocytes
- Gametogenesis
- Gamma
- Gamma aminobutyric acid
- Gamma camera
- Gamma delta T cells
- Gamma distribution
- Gamma globulin
- Gamma glutamyl transpeptidase
- Gamma hydroxybutyric acid
- Gamma interferon
- Gamma linolenic acid
- Gamma motor neurons
- Gamma oryzanol
- Gamma photon
- Gamma probe
- Gamma radiation
- Gamma rays
- Gamma secretase
- Gamma wave
- Gamma-glutamyltransferase
- Gammacoronavirus
- Gammadelta T cells
- Gammaherpesvirinae
- Gammaproteobacteria
- Gammaretrovirus
- Gammopathy
- Ganaxolone
- Ganciclovir
- Ganglia
- Ganglioglioma
- Ganglion
- Ganglion cell
- Ganglion cell layer
- Ganglion cells
- Ganglion cysts
- Ganglion impar
- Ganglioneuroblastoma
- Ganglioneuroma
- Ganglionic blockers
- Ganglionic eminence
- Gangliosides