| Abbreviation | Definition |
|---|---|
| G | Gatling |
| G | Gender |
| G | Giga |
| G | Grenade |
| G | Guts |
| G&A | General and Administration Expenses |
| G.I. | enlisted soldier ["government issue"] |
| G/A | Ground to Air |
| G/VLLD | Ground Vehicular Laser Locator Designator |
| G/VLLD | Ground/vehicle Laser Locator Designator |
| G0 | AGCCS Workstation Class Computer |
| G1 | Personnel and Administration Staff at Corps and Division |
| G-1 | Army or Marine Corps Component Manpower or Personnel Staff Officer (Army Division or Higher Staff, Marine Corps Brigade or Higher Staff) |
| G18 | Glock pistol model 18 |
| G2 | Intelligence Staff at Corps and Division |
| G-2 | Army or Marine Corps Component Intelligence Staff Officer (Army Division or Higher Staff, Marine Corps Brigade or Higher Staff) |
| G2SEC | Intelligence Section |
| G3 | Operations, Plans and Training Staff at Corps and Division |
| G-3 | Army or Marine Corps Component Operations Staff Officer (Army Division or Higher Staff, Marine Corps Brigade or Higher Staff) |
| G-3 | Deputy Assistant Chief of Staff Operations |