| G |
| G | General (Staff): 1-Administration; 2-Intelligence; 3-Operations; 4 -Logistics; 5-Plans; 6-Communications Electronics |
| g | Unit of acceleration (32.2 ft/sec). |
| GAF | Ground to Air Fire |
| Gaggle | Slang for a number of aircraft operating in close proximity, not necessarily in any semblance of formation. |
| Gal/GAL | Gallon |
| GAM-83 | BULLPUP; air-to-ground guided missile |
| GAMO | Groupe Administratif Mobile Operationnel/Organization - French directed village administrative cadres prior to 1954. Also the regular designation of Mobile Administrative Cadres initiated in 1964. |
| GAO | General Accounting Office |
| GAVB | General Association of Vietnamese Buddhists |
| GBA | General Buddhist Association |
| GCA | Ground Control/Controlled Approach |
| GCI | Ground Controlled Element |
| GCI | Ground Controlled Interception |
| GDA | Gun Damage Assessment |
| GDR | General Directorate of Rear Services |
| GDR | German Democratic Republic (East Germany) |
| GDRS | General Directorate of Rear Services |
| GEN | General |
| GFCS | Gunfire Control System |
| GFE | Government Furnished Equipment |
| GFP | Government Furnished Property |
| GIS | Government Information Service |
| GKR | Government of Khmer Republic |
| GLO | GVN Liaison Officer |
| GLO | Gun Liaison Officer |
| GM | General Motors |
| GM | Gunners Mate |
| GMT | Greenwich Mean Time, Z or Zulu Time |
| GNORS | Grounded Not Operationally Ready Supply |
| GNP | Gross National Product |
| GNVN | Government of North Vietnam |
| GNZ | Government of New Zealand |
| GO | General Order |
| GOA | Government of Australia |
| GOC | Government of Cambodia |
| GOCO | Government Owned/Contractor Operated |
| GOF | Government of France |
| GOI | Government of India |
| GOK | Government of (South) Korea |
| GOP | Government of the Philippines |
| GOS | Government of Spain |
| GOT | Gulf of Tonkin |
| Gp/GP | Group |
| GPES | Ground Proximity Extraction System |
| GPW | Provisions of the Geneva Convention Relating to Prisoners of War |
| GPWC | Geneva Prisoners of War Convention |
| GPWD | General Political Warfare Department |
| GR | Government Representative |
| GRC | Government of the Republic of China |
| GRD | Ground |
| GRVN | Government of the Republic of Vietnam |
| GS | General Support |
| GSF | Ground Security Force |
| GSG | General Support Group |
| GUARD | Emergency UHF radio channel usually monitored by all aircraft and ground stations as a secondary frequency. |
| Gunships | Transport Aircraft equipped with side-firing machineguns and, in some, with cannons. |
| GVN | Government of South Vietnam |