| Gallium Nitrate Action Pathway |  | Drug Action | ATP / Gallium nitrate |
| Gamma-Aminobutyric Acid Biosynthesis |  | Metabolic | Pyridoxal phosphate / Glutamic acid / ATP / Calcium / Magnesium cation / Cyclic adenosine monophosphate / gamma-Aminobutyric acid / Pyrophosphoric acid |
| gamma-Cystathionase Deficiency (CTH) |  | Disease | Pyridoxal phosphate / Serine / Cysteine / 2-Oxobutanoic Acid |
| gamma-Cystathionase Deficiency (CTH) |  | Disease | Pyridoxal phosphate / Serine / Cysteine / 2-Oxobutanoic Acid |
| gamma-Glutamyltransferase Deficiency |  | Disease | Glutamic acid / Glutathione / Glycine / Cysteine / Alanine / ATP / Zinc / Pidolic acid / Flavin adenine dinucleotide / gamma-Glutamylcysteine / S-Methyl glutathione |
| gamma-Glutamyltransferase Deficiency |  | Disease | Glutamic acid / Glutathione / Glycine / Cysteine / Alanine / ATP / Zinc / Pidolic acid / Flavin adenine dinucleotide / gamma-Glutamylcysteine / S-Methyl glutathione |
| gamma-Glutamyltranspeptidase Deficiency |  | Disease | Glutamic acid / Glutathione / Glycine / Cysteine / Alanine / ATP / Zinc / Pidolic acid / Flavin adenine dinucleotide / gamma-Glutamylcysteine / S-Methyl glutathione |
| gamma-Glutamyltranspeptidase Deficiency |  | Disease | Glutamic acid / Glutathione / Glycine / Cysteine / Alanine / ATP / Zinc / Pidolic acid / Flavin adenine dinucleotide / gamma-Glutamylcysteine / S-Methyl glutathione |
| Ganaxolone Action Pathway |  | Drug Action | Pyridoxal phosphate / Glutamic acid / ATP / Calcium / Magnesium cation / Cyclic adenosine monophosphate / gamma-Aminobutyric acid / Pyrophosphoric acid / Ganaxolone |
| Ganciclovir Action Pathway |  | Drug Action | Ganciclovir / Magnesium cation |
| Ganciclovir Drug Metabolism |  | Metabolic | Ganciclovir |
| Gastric Acid Production |  | Physiological | ATP / Potassium cation / Zinc / Acetylcholine |
| Gaucher Disease |  | Disease | Pyridoxal phosphate / Serine / ATP / Calcium / Magnesium cation / Zinc / Uridine diphosphate glucose / Hexadecanal / Uridine-5'-Diphosphate / N,N,N-Trimethyl-2-(phosphonooxy)ethanaminium |
| Gaucher Disease |  | Disease | Pyridoxal phosphate / Serine / ATP / Calcium / Magnesium cation / Zinc / Uridine diphosphate glucose / Hexadecanal / Uridine-5'-Diphosphate / N,N,N-Trimethyl-2-(phosphonooxy)ethanaminium |
| Gefitinib Action Pathway |  | Drug Action | Gefitinib |
| Gefitinib Action Pathway (New) |  | Drug Action | Zinc / Afatinib |
| Gefitinib Predicted Metabolism Pathway |  | Metabolic | Gefitinib / Mesoheme |
| Gemcitabine Action Pathway |  | Drug Action | ATP / Gemcitabine / Magnesium cation |
| Gemcitabine Action Pathway (old) |  | Drug Action | ATP / Gemcitabine / Magnesium cation / Zinc |
| Gemcitabine Metabolism Pathway (old) |  | Drug Metabolism | ATP / Gemcitabine / Magnesium cation / Zinc |
| Gemfibrozil Action Pathway |  | Drug Action | Biotin / Gemfibrozil / Magnesium cation |
| Gentamicin Action Pathway |  | Drug Action | Gentamicin |
| Gentamicin Action Pathway (New) |  | Drug Action | Gentamicin |
| Geraniol Predicted Metabolism Pathway |  | Metabolic | Mesoheme / Geraniol |
| Gi Adrenergic Smooth Muscle Contraction |  | Physiological | ATP / Potassium cation / Calcium / Magnesium cation / Cyclic adenosine monophosphate |