| Abbreviation | Definition |
|---|---|
| GIF | Graphics Interchange Format |
| GIFT | Group Interactive Feedback Technology |
| GII | Guard Interval Insertion |
| GILD | Gas Immersion Laser Doping |
| GIT | Geospatial Information Technologies |
| GJ | Gap Junction |
| GLC | Gas Liquid Chromatography |
| GLCD | Graphical LCD |
| GLID | Guidance Laser Illumination Device |
| GLV | Grating Light Valve |
| GM | Generally Modulated |
| GMA | Gas Metal Arc welding |
| GMAC | Giga Multiply-Accumulate |
| GMES | Green Mountain Electric Supply |
| GMW | General Magnet Wire |
| GN | General Electric |
| GN | Grid Node |
| GNAD | Global Network Addressing Domain |
| GNAT | Globall network addressing domain |
| GND | Ground (voltage level) |