| Abbreviation | Definition |
|---|---|
| GC | Ground Control |
| GC | Guidance Control |
| GC | GyroCompassing |
| GCC | Ground Communications Coordinator |
| GCC | Ground Control Center |
| GCCB | Ground Systems Configuration Control Board |
| GCCC | Ground Control Computer Center |
| GCCD | Guidance and Control Concept Demonstrator |
| GCCO | Ground Control CheckOut |
| GCCS | Geostationary Communication and Control Segment |
| GCD | Gyro-Compass, Desired Cluster Orientation |
| GCDC | Ground Checkout Display and Control |
| GCDCS | Ground Checkout Display and Control System |
| GCE | Ground Checkout Equipment |
| GCF | Ground Communications Facility |
| GCHX | Ground Cooling Heat Exchanger |
| GCIL | Ground Command Interface Logic |
| GCIL | Ground Control Interface Logic |
| GCILC | Ground Command Interface Logic Controller |
| GCILU | Ground Control Interface Logic Unit |