| ewm | EWView DOS Map |
| ewt | EWView DOS Track Data |
| eww | ER Mapper World Data |
| fbg | AGPS-Shape Pro Ground Surface |
| fbn | ArcGIS RO Spatial Index |
| fbx | ArcGIS RO Spatial Index |
| fit | Garmin FIT Data |
| fjv | iGO Primo FJV Map |
| fjw | iGO Primo Junction View Data |
| fly | TerraExplorer Project |
| freelist | ArcGIS Freelist Data |
| fx3 | Fugawi Raster Map |
| fx4 | Fugawi Raster Map |
| g7t | G7ToWin Track Data |
| gdbindexes | ArcGIS Geodatabase Index |
| gdbtable | ArcGIS Geodatabase Table |
| gdbtablx | ArcGIS Geodatabase Table Index |
| gen | ArcView Ungenerate File |
| gen | OpenMap General Information Data |
| geojson | GeoJSON Data |
| geor | ariesoGEO GEOR Data |
| geot | ariesoGEO GEOT Data |
| ger | OpenMap Geo Reference Data |
| gfw | ArcGIS GIF World Data |
| ggf | GPS Pathfinder Office Geoid Grid |
| ggz | Garmin Zipped Geocaching Data |
| ghd | Geonaute Keymaze Tracklog |
| gifw | ArcGIS GIF World Data |
| gis | Carlson SurvCADD GIS File |
| glc | iGIS GLC Data |
| gmg | Global Mapper Grid Data |
| gmi | GPS Tuner Map Calibration Data |
| gmn | Garmin Forerunner Tracklog |
| gmw | Global Mapper Workspace |
| gnd | ArcGIS ArcPad Geography Network Definition |