| gmy | HemeLB Geometry Data |
| gna | Genigraphics Graphics Link Presentation |
| gnc | Great Notions Embroidery Data |
| gnet | PJM GNET Data |
| gnf | GluonPilot Navigation File |
| gni | VisiDAQ Data File |
| gno | GenoPro Genealogy Tree |
| gnote | Google Keep Note Data |
| gnp | GNPeak Output File |
| gns | Sound Health Abacus Genesis Data |
| gnucash | GnuCash Financial Data |
| gnx | Genigraphics Graphics Link Presentation |
| gnx | GNPeak Numeric Output File |
| go! | Go!Zilla Unfinished Download Data |
| goa | SpiceCAD Data |
| gocad | GOCAD ASCII Data |
| gof | GameExchange2 RAW Object |
| gold | Gnome Desktop Data |
| gopal | Medion GoPal Navigation Data |
| gosh | GOSH Style File |
| gost | GOST R 34.10-94 Hash Data |
| gost12 | GOST R 34.11-2012 Hash Data |
| gotmp | Gaussian Z-matrix Template |
| 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 |
| gpc | Money S3 Financial Exchange Data |
| gpd | Xbox360 Game Play Data |
| gpg | GnuPG Signature/Key |
| gph | Lotus 1-2-3 Graph Data |
| gph | Pro/ENGINEER User-Defined Feature Data |
