| GABA |  | Physiological | Pyridoxal phosphate / Glutamic acid / ATP / Calcium / Magnesium cation / Cyclic adenosine monophosphate / gamma-Aminobutyric acid / Pyrophosphoric acid |
| GABA-Transaminase Deficiency |  | Disease | Pyridoxal phosphate / Histidine / Aspartic acid / Glutamic acid / NADH / Calcium / Zinc / Pantothenic acid / Dihydrouracil / Oxogluric acid / beta-Alanine / Flavin adenine dinucleotide / Flavin mononucleotide / Uracil |
| GABA-Transaminase Deficiency: beta-alanine |  | Disease | Pyridoxal phosphate / Histidine / Aspartic acid / Glutamic acid / NADH / Calcium / Zinc / Pantothenic acid / Dihydrouracil / Oxogluric acid / beta-Alanine / Flavin adenine dinucleotide / Flavin mononucleotide / Uracil |
| Gabapentin Action Pathway |  | Drug Action | Gabapentin / Calcium |
| Gadobenic Metabolism |  | Metabolic | Gadobenic acid |
| Gadodiamide Drug Metabolism |  | Metabolic | Gadodiamide |
| Gadodiamide Metabolism |  | Metabolic | Gadodiamide |
| Gadopentetic acid Metabolism |  | Metabolic | Gadopentetic acid |
| Gadoteric acid Metabolism |  | Metabolic | Gadoteric acid |
| Gadoteridol Drug Metabolism |  | Metabolic | Gadoteridol |
| Gadoteridol Metabolism |  | Metabolic | Gadoteridol |
| Gadoversetamide Drug Metabolism |  | Metabolic | Gadoversetamide |
| Gadoversetamide Metabolism |  | Metabolic | Gadoversetamide |
| Gadoxetic acid Metabolism |  | Metabolic | Gadoxetic acid |
| Galactose Metabolism |  | Metabolic | NADH / ATP / Magnesium cation / Iron / Zinc / Sorbitol / Uridine diphosphate glucose / Alpha-D-Galactose-1-Phosphate / Uridine-5'-Diphosphate / Glycerin / Pyrophosphoric acid / Fructose / Lactose / Inositol |
| Galactosemia |  | Disease | NADH / ATP / Magnesium cation / Iron / Zinc / Sorbitol / Uridine diphosphate glucose / Alpha-D-Galactose-1-Phosphate / Uridine-5'-Diphosphate / Glycerin / Pyrophosphoric acid / Fructose / Lactose / Inositol |
| Galactosemia |  | Disease | NADH / ATP / Magnesium cation / Iron / Zinc / Sorbitol / Uridine diphosphate glucose / Alpha-D-Galactose-1-Phosphate / Uridine-5'-Diphosphate / Glycerin / Pyrophosphoric acid / Fructose / Lactose / Inositol |
| Galactosemia II (GALK) |  | Disease | NADH / ATP / Magnesium cation / Iron / Zinc / Uridine diphosphate glucose / Alpha-D-Galactose-1-Phosphate / Pyrophosphoric acid |
| Galactosemia II (GALK) |  | Disease | NADH / ATP / Magnesium cation / Iron / Zinc / Uridine diphosphate glucose / Alpha-D-Galactose-1-Phosphate / Pyrophosphoric acid |
| Galactosemia III |  | Disease | NADH / ATP / Magnesium cation / Iron / Zinc / Uridine diphosphate glucose / Alpha-D-Galactose-1-Phosphate / Pyrophosphoric acid |
| Galactosemia III |  | Disease | NADH / ATP / Magnesium cation / Iron / Zinc / Uridine diphosphate glucose / Alpha-D-Galactose-1-Phosphate / Pyrophosphoric acid |
| Galantamine Action Pathway (new, revision) |  | Drug Action | Choline / Galantamine / Calcium / Magnesium cation / Acetylcholine / Acetic acid |
| Gallamine triethiodide Drug Metabolism |  | Metabolic | Gallamine triethiodide |
| Gallium citrate Ga-67 Drug Metabolism |  | Metabolic | Gallium citrate Ga-67 |
| Gallium Ga-68 gozetotide Drug Metabolism |  | Metabolic | Gallium Ga-68 gozetotide |