| Abbreviation | Definition |
|---|---|
| GG | Graphics Generator |
| GIACC | Group on International Aviation and Climate Change |
| GIAD | Girls in Aviation Day |
| GITA | Ground Instructional Training Aircraft |
| GKN | Guest, Keen and Nettlefolds |
| GLACIER | GLobal Aerospace Centre for Icing and Environmental Research (Thompson, Manitoba, Canada) |
| GLONASS | Global Navigation Satellite System |
| GLS | GPS Landing System |
| GMECO | Guangzhou Aircraft Maintenance Engineering Corporation |
| GNR | Generator Neutral Relay |
| GNSS | Global Navigation Satellite System |
| GOA | Glider Operations Area |
| GOAL | German Operating Aircraft Leasing |
| GPIRS | Global Position Inertial Reference System |
| GPM | General Processor Module |
| GPRA | Greater Peoria Regional Airport |
| GPS | Global Positioning System |
| GR | Graphite |
| GRAS | Gilze Rijen Aviation Society |
| GRIA | Greater Rochester International Airport |