| Abbreviation | Definition |
|---|---|
| GMC | Georgia Military College |
| GMC | Global Military Communications |
| GMC | Guía Militar de Carreteras |
| GMCM | Master Chief Gunners Mate |
| GMCS | Senior Chief Gunners Mate |
| GMD | General Material Designation |
| GMD | Global Missile Defense |
| GMD | Ground-based Midcourse Defense |
| GMD | Group Mux and/or Demux |
| GMDS | German Military Documents Section |
| GMF | Global Military Force |
| GMF | Ground Mobile Force |
| GMFP | Global Military Force Policy |
| GMFSC | Ground Mobile Forces Satellite Communications |
| GMFU | Grand Military Foul Up |
| GMG | Grenade Machine Gun |
| GMI | General Military Intelligence |
| GML | Guided Missile Launcher |
| GMLR | Guided Missiles and Large Rockets |
| GMLRS | Global Positioning System Multiple Launch Rocket System |