| Acronyms | Meaning / Significance |
Source |
| G-A-G | ground - air - ground | |
| GA | general alert | |
| GA | goal architecture study | |
| GA | ground attack | |
| GAF | German air force | |
| GAFACS | German air force automatic communication system | AutoFüFmNLw |
| GAFDIN | German air force digital net | |
| GAFTAC | German air force tactical command | |
| GAME | GEADGE/ADKAR message exchange | |
| GAN | global area network | |
| GAS | goal architecture study | C3 master plan |
| GAT | general air traffic | |
| GBS | global broadcast system | AC/317-N/840 |
| GBS | Global Broadcats System | |
| GDLP | ground data link processor | |
| GDM | Group on Defense Matter | |
| GDMI | generic definition of management information | |
| GDMO | guidelines for the definition of managed objects | |
| GDP | general defense plan | |
| GDSS | global decision support system | |
| GE | ground environment | |
| GE | Guerre Electronique | |
| GEADGE | German air defense ground environment | |
| GEHOC | German HAWK operation centre | |
| GEIP | Groupe Europeen Independant de Programmes | |
| GEK | Geräteentsorgungskonzept | |
| GENESIS | general purpose CIS | UK electronic mail and telefax |
| GEOSYS | geographic and mapping system | |
| GEP | group employment plan | |
| GFE | government furnished equipment | |
| GFIM | Groupe de Forces Interarmees Multinationales | |
| GICB | ground initiated comm-B | Data Protocol for Mode S |
| GID | Generic Indicator Directories | |
| GIS | Geographic Information System | ACE ACCIS Core cap specs |
| GKS | Graphical Kernel System | |
| GLCM | Ground Launched Cruise Missile | |
| GM | General Manager | |
| GMDSS | Global Maritime Distress Safety System | |
| GMF | ground mobile forces | |
| GMI | generic management information | |
| GNMP | government network management profile | |
| GNR | general nuclear response | |
| GNSS | global navigation satellite system | |
| GOB | Ground Order of Battle | |
| GoS | Grade of Service | |
| GOS | grade of service | |
| GOSIP | governmental open systems interconnection profile | |
| GOTS | government off-the-shelf (software) | |
| GPA | group provisonal acceptance | |
| GPP | general purpose processor | |
| GPPS | general purpose packet switching | |
| GPS | general purpose segment | AC/317/SEC/95/47 |
| GPS | global positioning system | |
| GPTN | general purpose telecommunication network | UK |
| GPTS | general purpose telecommunication system | |
| GROBAT | ground order of battle | |
| GSDS | ground situation display system | |
| GSE | Global Security Environment | |
| GSFG | group of soviet forces in Germany | |
| GSM | global system for mobile communications | |
| GSM | ground station module | |
| GSM | group special mobile | STC CSNI final report 22/9/95 |
| GSO | group of senior officials | |
| GSSE | ground specific converter/formatter | |
| GSTN | general switched telephone network | |
| GTN | global transport network | |
| GTNC | German territorial northern command | |
| GTSC | German territorial southern command | |
| GUI | Graphic User Interface | |
| GUI | graphical user interface | |
| GUTM | geodetic universal transmercator conversion | |
| GW | gateway |