| Abbreviation | Definition |
|---|---|
| GLASS | Ground Level Alien Strike Simulator |
| GLC | Generalized Linear Cryptanalysis |
| GLCM | Ground Launched Cruise Missile |
| GLDS | Ground Laser Designator System |
| GLDS | round Laser Designator System |
| GLH | Goes Like Hell |
| GLHMG | Grenade Launching Heavy Machine Gun |
| GLHS | Ground Launched HELLFIRE System |
| GLHS | round Launched HELLFIRE System |
| GLINT | Gated Laser Intensifier |
| GLLD | Ground Laser Location Designator |
| GLO | Get the Lead Out |
| GLO | Ground Liaison Officer |
| GLO | Gunnery Liaison Officer |
| GLO | GVN (Government of VietNam) Liaison Officer |
| GLOB | Ground Loving Old Bastard |
| GLOBECOM | Global Communication System |
| GLOC | Ground Line Of Communication |
| G-LOC | G-induced Loss Of Consciousness |
| GLOMB | Glider Bomb |