| gni | VisiDAQ Data File |
| gno | GenoPro Genealogy Tree |
| gnp | GNPeak Output File |
| gnx | GNPeak Numeric Output File |
| gocad | GOCAD ASCII Data |
| gof | GameExchange2 RAW Object |
| gold | Gnome Desktop Data |
| gopal | Medion GoPal Navigation Data |
| gosh | GOSH Style File |
| gov | Netmino Data |
| goz | Pixologic ZBrush GoZ File |
| gp1 | GamePark.cz Client Data |
| gp1 | Gerber Internal Plane Layer 1 Data |
| gp2 | Gerber Internal Plane Layer 1 Data |
| gp3 | Gerber Internal Plane Layer 1 Data |
| gpb | Gerber Pad Master Bottom Data |
| gpd | Xbox360 Game Play Data |
| gpg | GnuPG Signature/Key |
| gpi | Garmin Point of Interest Data |
| gpk | Steinberg WaveLab Audio Peak |
| gpkg | GRAMPS Data Package |
| gpl | Gimp Palette Data |
| gpl | GenePix Lab Book |
| gpm | Linger Lingrapher Graph Parameter File |
| gpp | Guitar Practiced Perfectly 2 Data |
| gpr | GenePix Results File |
| gpro | Genealogy Pro Data |
| gps | GOM Player Skin |
| gpt | Gerber Pad Master Top Data |
| gpw | Graph Paper World File |
| gpx | GPS Exchange Format Data |
| gqa | BI/Query Admin Data Model |
| gqf | GrafEq Data |
| gqfl | GrafEq Data |
| gql | BI/Query Data Model |
