| gte | GigaTrust Client Protected Data |
| gtf | Gene Transfer Format File |
| gthr | Microsoft SharePoint Portal Server Gather Log |
| gti | GT STRUDL Geometry Data |
| gtl | Gerber Top Layer Data |
| gtm | CFX Mesh File |
| gto | Gerber Top Overlay Data |
| gtp | Gerber Top Paste Mask Data |
| gtr | GenePattern Gene Tree File |
| gts | Gerber Top Solder Mask Data |
| gui | GUI Design Studio Design |
| guides | xScope Guides Data |
| guikit | Shapeshifter Theme |
| gus | XMVB Orbital Guess Data |
| gvar | PLINK Genetic Variant File |
| gvf | Genome Variation Format Data |
| gvfx | Microvellum Global File |
| gvs | GuitarVision Data |
| gw | SWAT Groundwater Input Data |
| gwc | Groundspeak Compiled Wherigo Cartridge |
| gwl | Groundspeak Wherigo Cartridge Log |
| gws | Groundspeak Wherigo Save File |
| gwt | GeoDa Distance Weights Data |
| gwv | Groundwater Vistas Packaged Model |
| gwy | Gwyddion Surface Data |
| gwz | Groundspeak Wherigo Cartridge Archive |
| gx2 | General CADD Pro Image |
| gxa | General CADD Attribute Data |
| gxc | General CADD Pro Component |
| gxh | General CADD Pro Hatch |
| gxl | Graph Exchange Language |
| gxm | General CADD Pro Macro |
| gxs | GrafiXML Graph |
| gxv | General CADD Pro Menu |
| gxy | ISIS GIS Visualiser Schematic Data |
