| Abbreviation | Definition |
|---|---|
| GTP | Green Tree Python |
| GTTAC | Gene Technology Technical Advisory Committee |
| GTTAC | Gene Technology Technical Advisory Committee (Australia) |
| GUVMA | Glasgow University Veterinary Medical Association |
| GUVZS | Glasgow University Veterinary Zoological Society |
| GVL | Glenmark Veterinary Limited |
| GVR | Georgia Veterinary Rehabilitation |
| GVS | Georgia Veterinary Specialists |
| GVS | Goat Veterinary Society |
| GW | Great White |
| GWB | Great White Buffalo |
| GWT | Green-Winged Teal (bird) |
| HA | Horse Association |
| HABAC | Human Animal Bond Association Of Canada |
| HART | Hornet Autonomous Real Time |
| HATS | Horse Alternative Therapeutic Services |
| HB | Half Breed |
| HCULA | Humane Care and Use of Laboratory Animals |
| HE | horse epithelium |
| HEDRA | Heads of European Veterinary Regulatory Agencies |