| 1. | .gr2 | Screen driver (Windows 3.x) |
| 2. | .gra | Chart (Microsoft Graph) ◊ Datafile (SigmaPlot) ◊ Graph (Microsoft Graph) |
| 3. | .grads | Metafile |
| 4. | .grasp | Animation (GRAphical System for Presentation format) |
| 5. | .grb | Bitmap graphics B W binary (GROB Graphic Object) (HP-48sx calculator) ◊ Shell Monitor (MS-DOS 5) |
| 6. | .grd | Drivers for GRX (graphics library) ◊ Image processing grid (CHIPS) |
| 7. | .grdef | UI resource file (Geoworks) |
| 8. | .grf | Graph file (Graph Plus - Charisma) ◊ Grapher (Golden Software) graph |
| 9. | .grib | Gridded Binary (FM 92-VIII Ext. GRIdded Binary file) (WMO CBS) |
| 10. | .grn | Drivers for GRX (graphics library) |
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