| Abbreviation | Definition |
|---|---|
| G&A | General and Administrative |
| G&C | Guidance and Control |
| G&N | Guidance and Navigation |
| G&NS | Guidance and Navigation System |
| G/A | Ground-to-Air |
| G/C | Gradient-to-Cooling ratio |
| G/E | Graphite Epoxy |
| G/G | Ground-to-Ground |
| G/S | Guided Steering |
| G/T | Gain-to-noise Temperature ratio |
| GA | GAge |
| GA | General Assembly |
| GA | Glide Angle |
| GA | Gyro Assembly |
| G-A | Ground-to-Air |
| GA&CS | Ground Acquisition and Command Station |
| GAC | Ground Attitude Control |
| GAC | Grumman Aerospace Corporation |
| GACU | Ground Air Conditioning Unit |
| GACU | Ground Avionics Cooling Unit |