| Abbreviation | Definition |
|---|---|
| GNC | Guidance and Navigation Computer |
| GNCFTS | Guidance, Navigation, and Control Flight Test Station |
| GNCIS | Guidance, Navigation, and Control Integration Simulator |
| GNCS | Guidance and Navigation Control System |
| GNCTS | Guidance, Navigation, and Control Test Station |
| GNDC/O | GrouND CheckOut |
| GO2 | Gaseous Oxygen |
| GOAL | Ground Operations Aerospace Language |
| GOC | Ground Operations Coordinator |
| GOCA | Ground Operations Control Area |
| GOD | Gravitational Orbits Dynamics |
| GOE | Ground Operating Equipment |
| GOES | Geostationary Operational Environmental Satellite |
| GOF | Guest Observer Facility |
| GOH | Geosynchronous Orbiting Habitat |
| GOLF | Global Oscillations at Low Frequency |
| GOLI | Geoscience Online Learning Initiative |
| GOM | Ground Operations Manager |
| GOMI | Global Ozone Monitoring Instrument |
| GOMMS | Ground Operations and Material Management System |