| Abbreviation | Definition |
|---|---|
| GDK | GIMP (GNU Image Manipulation Program) Drawing Kit |
| GDM | GSM (Global System for Mobile communications) Data Module |
| GDPT | General Directorate of Posts and Telecommunications |
| GDS | Global Distribution System |
| GEO | Geostationary Earth Orbit |
| GERAN | GSM (Global System for Mobile communications) Edge Radio Access Network |
| GETS | The Government Emergency Telecommunications Service |
| GFC | Generic Flow Control |
| GFI | General Format Identifier |
| GFSK | Gaussian Frequency Shift Keying |
| GI | Graded Index |
| GITS | Global Information and Telecommunication Studies |
| GLD | German Long Distance |
| GLR | Gateway Location Register |
| GLT | Great Lakes Telecom |
| GMBS | Global Mobile Broadband System |
| GMFSATCOM | Ground Mobile Forces Satellite Communications |
| GMFU | Google Mobile-Friendly Update |
| GMLC | Gateway Mobile Location Center |
| GMRS | General Mobile Radio Service |