| Abbreviation | Definition |
|---|---|
| GCP | Ground Commander's Pointer |
| GCP | Ground Control Planning |
| GCP | Ground Control Position |
| GCP | Ground Control Processor (w/in CARS) |
| GCR | Group Coded Recording |
| GCRI | General Collective Routing Indicator (RI) |
| GCS | Geographic Coordinate System |
| GCS | Ground Combat Skills |
| GCS | Ground Control Station |
| GCSC | Global Contingency Service Contract |
| GCSS | Global Combat Support System |
| GCSS-J | Global Combat Support System - Joint |
| GCTN | Global Combating Terrorism Network |
| GCU | General Contact Unit |
| GCU | Ground Control Unit |
| GD | General Deployment |
| GD | General Dynamics |
| GD | Graphics Database |
| GD | Ground Duty |
| GD | Soman, A Nerve Agent |