| Abbreviation | Definition |
|---|---|
| GDS | Generator Drive Shaft |
| GDSS | Global Decision Support System |
| GDT | Ground Data Terminal |
| GDT | Ground Defense Training |
| GDU | Gun Display Unit |
| GE | General Engineering |
| GEADGE | (German Air Defense Ground Environment System) |
| GEADGE | German Air Defense Ground Environment System |
| GEAR | Guard and Educators Achieving Results |
| GEC | General Electric Corporation |
| GEF | Guidance For Employment of The Force |
| GELOC | Geographic Location Code |
| GELONS | Gun Electronic Laying Optical Night Sight |
| GEM | Global Information Grid (GIG) Enterprise Management |
| GEM | Ground Electronics Maintenance |
| GEM | Guidance Enhancement Missile |
| GEMB | Ground Electronics Maintenance Building |
| GEMSS | Ground Emplaced Mine Scattering System |
| GEN | General - Army |
| Gen | General - Marines |