| Abbreviation | Definition |
|---|---|
| GSSB | General Supply Support Base |
| GSSC | Global SATCOM (SATellite COMmunications) Support Center |
| GST | General Service Test |
| GST | Global Strike Team |
| GST | Ground Support Terminal |
| GSTS | Ground-based Surveillance and Tracking System |
| GSU | General Support Unit |
| GSU | Geographically Separated Unit |
| GSU | Ground Staff Office |
| GT | Generic Task |
| GT | Government Test |
| GTA | Grafenwoehr Training Area |
| GTA | Graphic Target Analyser |
| GTA | Graphic Training Aid |
| GTA | Ground Test Accelerator |
| GTAM | Ground To Air Missile |
| GTAS | Ground-To-Air Signals |
| GTB | General Transport Battalion |
| GTC | Gas Turbine Compressor |
| GTC | Good Til Cancelled |