| Abbreviation | Definition |
|---|---|
| G | Generic |
| G | Glucose |
| G | Gravida |
| G | Growing |
| G | Growth |
| G6PD | Glucose-6-phosphate-dehydrogenase |
| GA | Gastric Analysis |
| GA | General Anesthesia |
| GA | General Appearance |
| GA | Gestational Age |
| GAC | Generic Artificial Consciousness |
| GAD | General Anxiety Disorder |
| GAD | Generalised Anxiety Disorder |
| GAD | Generalized Anxiety Disorder |
| GAD | Graft Arterial Disease |
| GADS | Gilliam Asperger Disorder Scale |
| GAL | Glutes Abs And Legs |
| GAL1 | Galectin-1 (protein) |
| GALT | Gut Associated Lymphoid Tissue |
| GAP | Gluteal Artery Perforator |