| Abbreviation | Definition |
|---|---|
| GRP | Guidance Replacement Program |
| GRS | Galley Refrigeration System |
| GRU | Galley Refrigeration Unit |
| GSA | Glider Support Area |
| GSAB | General Support Aviation Battalion |
| GSAD | General Support Aviation Detachment |
| GUP | Gallup Municipal Airport, Gallup, New Mexico USA |
| GWCG | Gross Weight Center of Gravity |
| GWDU | Galley Waste Disposal Unit |
| GWIV | Grey Water Interface Valve |
| H/P | High Pressure |
| HA | Hosted Application |
| HAA | Heavy Anti Aircraft |
| HAATS | Hehigh Altitude Aviation Training Site |
| HAATS | High Altitude Aviation Training Site |
| HACE | Holland Aviation Consultancy Engineering |
| HACS | Hawaii Aviation Contract Services |
| HADA | Hyderabad Airport Development Authority |
| HADRA | Humanitarian Assistance and Disaster Response in Aviation |
| HAL | Hindustan Aeronautics Limited |