| gambas | Gambas V2 Application |
| gar | GridGain Archive |
| gas | Atari Jaguar GPU Assembly Source |
| gb | Basic4GL Source Code |
| gb1 | Game Maker Backup File |
| gb2 | Game Maker Backup File |
| gbas | GLBasic Source Code |
| gbf | BASIS GUIBuilder Control Data |
| gbk | Delphi Runimage iblocal Examples Data |
| Embarcadero InterBase Database Backup |
| gbl | Visual Basic Global Declaration |
| gbs | Generic Build Support Metadata File |
| gc1 | Golden Common Lisp 1.1 Source Code |
| gc3 | Golden Common Lisp 3 Source Code |
| gcc | GCC Related Data |
| gcda | Gcov Data File |
| gcg | GAUSS Compiled Program |
| gch | Precompiled C Header File |
| gcl | GNU Common Lisp Source Code |
| gcna | Gcov Compiled Output |
| gcno | Gcov Metadata File |
| gcob | TRANSFER Cobol Source Code |
| gcov | GNU GCOV Logfile |
| gcr | GlowCode Profiling Results |
| gd | Godot Engine Source Code |
| gdb | Embarcadero InterBase Database File |
| gdc | Godot Engine Compiled Script |
| gdf | Altera Quartus II Graphic Design Data |
| gdshader | Godot Engine Shader Data |
| gdt | Graph Drawing Toolkit Output |
| gek | GECK/Papyrus Script Editor Script |
| gemspec | RubyGems Gem Specification |
| gen | dBase Application Generator Compiled Template |
| generictest | Microsoft Visual Studio Generic Test Data |
| genmodel | Eclipse Modeling Framework GenModel Data |
| gex | GameMaker Studio Extension |
| gf | Grammatical Framework Source |
| gfa | GFA BASIC Tokenized Source |
| gfar | Greenfoot Scenario Archive |
| gfe | Grammatical Framework Example |
| gfm | GitHub Flavored Markdown Document |
| gfo | Grammatical Framework Object |
| gfs | Grammatical Framework Script |
| gfx | The Games Factory Extension |
| ggfx | FactoryTalk View Studio Global Object Display Component File |
| ggi | GGI Data |
| ghc | Adobe RoboHelp Visual Basic Constant Map |
| git | Git Repository Data |
| gitattributes | Git Attributes |
| gitconfig | Git Options Data |
| gitext | Git Extension |
| gitignore | Git Ignore File |
| gitkeep | Git Keep File |
| gitmodules | Git Submodule Properties Data |
| gld | 3DFX Glide Data |
| MPLAB C Compiler Linker Script |
| glnk | TRANSFER Linkage Definitions |
| glo | Adobe RoboHelp Glossary Data |
| Visual Basic Global Declaration |
| global | Global Makefile |
| gls | GLScript Game Script |
| glsl | OpenGL Shading Language File |
| glslesf | OpenGL ES Shader Fragment Data |
| glslesv | OpenGL ES Shader Variation Data |
| gluaw | Programmer's Notepad Text |
| glut | OpenGL GLUT Library Data |
| glut2 | OpenGL GLUT Library Data |
| glut3 | OpenGL GLUT Library Data |
| gly | Uniface Glyph Data |
| glyph | Uniface Glyph Object |
| gm | GameMonkey Script |
| gm6 | Game Maker 6.x Data |
| gm8 | Game Maker 8 Data |
| gm81 | Game Maker 8.1 Data |
| gmd | Game Maker 4.x Data |
| gmdb | GMap.NET Database |
| gmez | GameMaker Studio Extension |
| gmf | Game Maker 3.x Data |
| gmk | Game Maker 7.x Data |
| gml | GameMaker Studio GML Script |
