| Abbreviation | Definition |
|---|---|
| GS | Gofer script (Haskell language dialect) |
| GS1 | Presentation (GraphShow) |
| GSD | GSM internet realtime audio |
| GSD | Vector graphics (Professional Draw) |
| GSM | Sound (GSM 6.10 prI-ETS 300 036 13kbit/s) (Internet phones) |
| GSP | Geometer's Sketchpad Sketch file |
| GSS | Geometer's Sketchpad Script file |
| GSW | GraphShow Worksheet |
| GTAR | Compressed file archive (GNU tar) |
| GTK | GOBI Tool Kit file |
| GTX | GTX Group IV Raster graphics file |
| GV | GrandView outline file |
| GVP | Google Video Player |
| GWX | Genigraphics Graphics Link presentation |
| GWZ | Genigraphics Graphics Link presentation |
| GXL | Graphics library (Genus) |
| GYM | Geoworks Generic symbol file |
| GZ | Compressed file archive (GNU Zip) |
| GZIP | Compressed file archive (GNU Zip) |
| H | Header file |