| gizmo | Gizmo Central Data |
| gjd | GeoJet Professional Database |
| gjf | Gaussian Input Data |
| gjt | GAJET Input Data |
| gk | AutoGK Script |
| gka | Panasonic GKWIN Data |
| gkf | GAUSS Engine MTGRTE License |
| gko | Gerber Keep Out Layer |
| gkon | GraphicConverter Data |
| gkp | GameKeyboard Data |
| gkr | GCJ Key Storage |
| glad | GenePattern GLAD File |
| glb | Binary glTF Data |
| glb | gINT Library |
| gle | GLE Data |
| glf | GameExchange2 Light Data |
| glg | MicroSim PCBoard Photoplot Job |
| glh | Gallery Lock Pro Locked Video |
| glk | Gallery Lock Pro Locked Image |
| gll | EASE SpeakerLab Loudspeaker Model |
| glm | Sybase PowerDesigner Glossary Model |
| glm | BrainVoyager QX GLM Data |
| glob | Coq Globalization Data |
| glogic | gLogic Data |
| glp | NaviEdit Geoconsult Long Profile |
| gltf | GL Transmission Format Data |
| glv | ABB HTS500 Graphic Data |
| glw | Economatica Saved Screen |
| glx | Pasco DataStudio Data File |
| gly | Act! Group Layout |
