Penny's OS (S 7)

   
or Galaxy or Garnet OS
or GCOS or GDOS
or GECOS or GeekOS
or GeeXboX or Gelecek
or GEM or Gemini
or Genera or Generics UNIX
or Genie OS or GENIX
or Gentoo Linux or Gentoox
or GeoBox or GeoLivre Linux
or GEORGE or GEOS
or G.ho.st or Gibraltar
or Ging or Giotto
or Glendix or Glide
or GLUnixo or GM-NAA I/O
or GM OS or GnackTrack
or gNewSense or GNIX
or GNoppix or GNU
or GNUbie Linux or GNU-Darwin
or GNU/Hurd or GNU/Hurd on L4
or gnuLinEx or GNU/Linux Kinneret
or GNUppix or GNUstep Live CD
or Go! or Goah
or GoblinX or GoboLinux
or gobuntu or goobuntu
or GoodGoat Linux or Google Chrome OS
or gOS or Gould OS
or GParted or Grafpup
or Granular Linux or Grasshopper
or grml or Groovyos
or GS/OS or Guadalinex
or GUARDIAN or GUIDE