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"G" Terms and Definitions
| G-LOC | G-Induced Loss Of Consciousness |
| GA | General Aviation, all flying other than airlines and the military |
| GAAC | General Aviation Awareness Campaign |
| GAFOR | General Aviation Visual Flight Forecast. Met briefing service in operation in France, Germany, the Netherlands and some other European countries |
| GAMA | General Aviation Manufacturers Association, an American trade organisation |
| GAMTA | General Aviation Manufacturers & Traders Association, UK |
| GAPAN | Guild of Air Pilots and Air Navigators |
| GASIL | General Aviation Safety Information Leaflet |
| GCA | Ground-Controlled Approach |
| GFT | General Flying Test |
| Glonass | Russian equivalent of GPS/Navstar satellite navigation system |
| GND | Ground |
| GNSS | Global Navigation Satellite Systems |
| Goxio | VHF direction-finding (France) |
| GP | Glidepath |
| GPH | Gallons Per Hour |
| GPS | Global Positioning System |
| GPWS | Ground Proximity Warning System |
| GRADU | Gradual (term used in met reports) |
| GRP | Glassfibre-Reinforced Plastic |
| GS | Glideslope |
| G/S | Groundspeed. The speed an aircraft makes over the ground |