| Extension | File Description |
| .GBX | Game Files |
| .GBY | Uncommon Files |
| .GBZ | Uncommon Files |
| .GC | Game Files |
| .GC0 | Uncommon Files |
| .GC1 | Uncommon Files |
| .GC2 | Uncommon Files |
| .GC3 | Uncommon Files |
| .GC4 | Uncommon Files |
| .GC5 | Uncommon Files |
| .GC6 | Uncommon Files |
| .GC7 | Uncommon Files |
| .GC8 | Uncommon Files |
| .GC9 | Uncommon Files |
| .GCA | Compressed Files |
| .GCB | Uncommon Files |
| .GCC | Uncommon Files |
| .GCD | Disk Image Files |
| .GCE | Uncommon Files |
| .GCF | Game Files |
| .GCG | Uncommon Files |
| .GCH | Uncommon Files |
| .GCI | Game Files |
| .GCJ | Uncommon Files |
| .GCK | Uncommon Files |
| .GCL | Uncommon Files |
| .GCM | Game Files |
| .GCN | Uncommon Files |
| .GCO | Uncommon Files |
| .GCP | Uncommon Files |
| .GCQ | Uncommon Files |
| .GCR | Uncommon Files |
| .GCS | Game Files |
| .GCT | Game Files |
| .GCU | Uncommon Files |
| .GCV | Uncommon Files |
| .GCW | Uncommon Files |
| .GCX | Data Files |
| .GCY | Uncommon Files |
| .GCZ | Uncommon Files |
| .GD0 | Uncommon Files |
| .GD1 | Uncommon Files |
| .GD2 | Uncommon Files |
| .GD3 | Uncommon Files |
| .GD4 | Uncommon Files |
| .GD5 | Uncommon Files |
| .GD6 | Uncommon Files |
| .GD7 | Uncommon Files |
| .GD8 | Uncommon Files |
| .GD9 | Uncommon Files |
| .GDA | Uncommon Files |
| .GDB | Database Files |
| .GDBTABLE | Uncommon Files |
| .GDC | Uncommon Files |
| .GDD | Uncommon Files |
| .GDE | Uncommon Files |
| .GDF | Data Files |
| .GDG | Uncommon Files |
| .GDH | Uncommon Files |
| .GDI | Uncommon Files |
| .GDJ | Uncommon Files |
| .GDK | Uncommon Files |
| .GDL | CAD Files |
| .GDM | Uncommon Files |
| .GDN | Uncommon Files |
| .GDO | Uncommon Files |
| .GDP | Uncommon Files |
| .GDQ | Uncommon Files |
| .GDR | Font Files |
| .GDS | CAD Files |
| .GDT | Uncommon Files |
| .GDU | Uncommon Files |
| .GDV | Uncommon Files |
| .GDW | Game Files |
| .GDX | Uncommon Files |
| Extension | File Description |
| .GDY | Uncommon Files |
| .GDZ | Uncommon Files |
| .GE | Uncommon Files |
| .GE0 | Uncommon Files |
| .GE1 | Uncommon Files |
| .GE2 | Uncommon Files |
| .GE3 | Uncommon Files |
| .GE4 | Uncommon Files |
| .GE5 | Uncommon Files |
| .GE6 | Uncommon Files |
| .GE7 | Uncommon Files |
| .GE8 | Uncommon Files |
| .GE80 | Uncommon Files |
| .GE9 | Uncommon Files |
| .GEA | Uncommon Files |
| .GEANT | Uncommon Files |
| .GEAR | Uncommon Files |
| .GEB | Uncommon Files |
| .GEC | Uncommon Files |
| .GED | Data Files |
| .GEDCOM | Data Files |
| .GEDTD | Uncommon Files |
| .GEE | Uncommon Files |
| .GEF | Uncommon Files |
| .GEG | Uncommon Files |
| .GEH | Uncommon Files |
| .GEI | Uncommon Files |
| .GEJ | Uncommon Files |
| .GEK | Uncommon Files |
| .GEL | Uncommon Files |
| .GEM | Developer Files |
| .GEN | Data Files |
| .GENERAL | Uncommon Files |
| .GENIE | Uncommon Files |
| .GENKEY | Uncommon Files |
| .GEO | 3D Image Files |
| .GEOG | Uncommon Files |
| .GEP | Uncommon Files |
| .GEQ | Uncommon Files |
| .GER | Uncommon Files |
| .GERMAN | Uncommon Files |
| .GES | Uncommon Files |
| .GESTION | Uncommon Files |
| .GET | Uncommon Files |
| .GETBILL | Uncommon Files |
| .GETRIGHT | Uncommon Files |
| .GETVERS | Uncommon Files |
| .GEU | Uncommon Files |
| .GEV | Uncommon Files |
| .GEW | Uncommon Files |
| .GEX | Uncommon Files |
| .GEY | Uncommon Files |
| .GEZ | Uncommon Files |
| .GF | Font Files |
| .GF0 | Uncommon Files |
| .GF1 | Uncommon Files |
| .GF2 | Uncommon Files |
| .GF3 | Uncommon Files |
| .GF4 | Uncommon Files |
| .GF5 | Uncommon Files |
| .GF6 | Uncommon Files |
| .GF7 | Uncommon Files |
| .GF8 | Uncommon Files |
| .GF9 | Uncommon Files |
| .GFA | Uncommon Files |
| .GFB | Raster Image Files |
| .GFC | Uncommon Files |
| .GFD | Uncommon Files |
| .GFE | Uncommon Files |
| .GFF | Uncommon Files |
| .GFG | Uncommon Files |
| .GFH | Uncommon Files |
| .GFI | Uncommon Files |
| .GFJ | Uncommon Files |
| .GFK | Uncommon Files |
