Letter: G
- gambatte - An accuracy-focused Game Boy / Game Boy Color emulator
- gcube - Nintendo Gamecube emulator
- gecko-mediaplayer - Gnome MPlayer browser plugin
- gfceu - GFCE Ultra Nintendo Emulator frontend
- gltron - A 3D game inspired by the movie TRON
- gnome-mplayer - An MPlayer GUI, a full-featured binary
- gnuboy - Nintendo GameBoy Color emulator
- gpac - MPEG-4 multimedia framework
- gstreamer-ffmpeg - GStreamer FFmpeg-based plug-ins
- gstreamer-plugins-bad - GStreamer streaming media framework "bad" plug-ins
- gstreamer-plugins-ugly - GStreamer streaming media framework "ugly" plug-ins
- gsview - PostScript and PDF previewer
- gtetrinet - GNOME version of a tetris game playable on the net