Alphabetically: G
Extension File Description File Type
.g
BRL-CAD Geometry File
CAD
.g3x
RealFlight Content File
Game
.g721
G.721 Audio File
Audio
.g723
G.723 Audio File
Audio
.g726
G.726 Audio File
Audio
.gadget
Windows Gadget
Executable
.galaxy
Blizzard Galaxy File
Game
.gallery
SMART Notebook Gallery File
Data
.gallerycollection
SMART Notebook Gallery Collection File
Data
.galleryitem
SMART Notebook Gallery Item File
Data
.gam
Saved Game File
Game
.game
Apple Chess Saved Game
Game
.gan
GanttProject Project File
Data
.gau
Flight Simulator Gauge File
Misc
.gb
Game Boy ROM File
Game
.gb1
Game Maker Backup File
Backup
.gba
Game Boy Advance ROM
Game
.gbap
Dream Design Entertainment GLBasic Project File
Developer
.gbas
Dream Design Entertainment GLBasic Source File
Developer
.gbc
Game Boy Color ROM
Game
.gbi
gBurner Project File
Disk Image
.gbp
Genie Timeline Backup Index File
Backup
.gbproj
GarageBand Project
Audio
.gbr
Gerber File
Data
.gbx
Gerber PCB File
CAD
.gc
GraphClick File
Data
.gca
GCA File Archive
Compressed
.gcd
Generic CADD Drawing File
CAD
.gcf
Game Cache File
Game
.gci
GameCube Save File
Game
.gcm
Game Cube ROM
Game
.gcs
GameCube SharkSave File
Game
.gcx
Grapher Graph File
Data
.gdb
InterBase Database File
Database
.gdr
Symbian OS Font File
Font
.gds
Graphic Data System File
CAD
.ged
GEDCOM Genealogy Data File
Data
.gedcom
GEDCOM Genealogy File
Data
.gem
RubyGems Package
Developer
.gen
ArcView ARC/INFO UnGenerate file
Data
.geo
VRML Geography File
3D Image
.gfb
GIFBlast Compressed Image File
Raster Image
.gfp
GreenForce-Player Protected Media File
Video
.gg
Google Desktop Gadget File
Misc
.ggb
GeoGebra Document
Data
.gho
Norton Ghost Backup File
Backup
.ghs
Norton Ghost Image Segment
Backup
.gi
Global Image
Disk Image
.gid
Windows Help Global Index File
Settings
.gif
Graphical Interchange Format File
Raster Image
.gig
Tascam GigaSampler File
Audio
.gih
GIMP Image Hose File
Raster Image
.gim
PlayStation Portable Image File
Raster Image
.gin
GEMS Engine Control Unit File
Settings
.gio
Adagio Score
Text
.gis
CFS Console Game Installer Settings File
Data
.gkh
Ensoniq EPS Family Disk Image
Disk Image
.gks
Graphics Kernel System File
Vector Image
.gl
GRASP Animation
Video
.glade
Glade Project File
Developer
.gld
MPLAB C Compiler Linker Script File
Developer
.global
Global Makefile
Developer
.gls
Babylon Glossary File
Data
.gly
Word Glossary File
Misc
.gm6
Game Maker 6 Project File
Developer
.gmbck
Game Maker Background Image File
Raster Image
.gmd
Game Maker Program Code
Developer
.gmf
Geology Multi-File
GIS
.gmk
Game Maker 7 File
Developer
.gml
Geography Markup Language File
GIS
.gmmp
WCS Gamut Map Model Profile
System
.gmo
GNU Machine Object File
Developer
.gmres
Game Maker Resource File
Game
.gms
Gesture and Motion Signal File
Data
.gmv
Gens Game Recording
Game
.gne
Flickr Web Page
Web
.gno
GenoPro Genealogy Tree File
Data
.gnp
GNPeak Output File
Data
.gnutar
GNU Tar Archive
Data
.gorm
Gorm Interface Resource File
Developer
.gp3
Guitar Pro 3 File
Data
.gp4
Guitar Pro 4 Tablature
Misc
.gp5
Guitar Pro 5 Tablature File
Audio
.gpbank
Guitar Pro Sound Bank File
Audio
.gpd
Graphic PhotoDefiner Image File
Raster Image
.gpe
GP2X Video Game
Executable
.gpf
GRAVITY Ragnarok Online Patch File
Game
.gpg
GNU Privacy Guard Public Keyring
Misc
.gpi
Garmin Point of Interest File
Data
.gpk
WaveLab Audio Peak File
Audio
.gpn
GlidePlan Map Document
Text
.gpr
Babylon Glossary Builder Project File
Data
.gps
GOM Player Skin File
Settings
.gpu
GP2X Utility Program
Executable
.gpx
GPS Exchange File
GIS
.gr2
Granny 3D File
Game
.gra
Microsoft Graph File
Data
.grade
GradeStat Document
Data
.graffle
OmniGraffle Drawing
Vector Image
.grasp
GRASP Animation
Video
.grd
Photoshop Gradient File
Settings
.grf
Generic Graph File
Data
.grib
Gridded Binary File
Data
.grk
Gradekeeper Class Gradebook File
Data
.grl
Windows Update Status File
System
.grn
Granny 3D File
3D Image
.gro
Graphic Object Bitmap
Raster Image
.grob
Graphic Object Bitmap File
Raster Image
.groove
ACID Groove File
Audio
.group
Windows Contacts Group File
System
.growlregdict
Growl Temp File
Misc
.growlticket
Growl Notification File
Settings
.grp
SmarterMail Group File
Data
.grr
Gradekeeper Class Roster File
Data
.grv
Office Groove File
Data
.gry
Grayscale Image
Raster Image
.gs
GemStone Document
Data
.gs3
GameStarter File
Developer
.gsd
General Station Description File
Text
.gsm
Global System for Mobile Audio File
Audio
.gsp
IMail Error Message File
Web
.gst
MapInfo Geoset File
GIS
.gtar
GNU Tar Archive
Data
.gthr
Gather Log File
Text
.gtp
Guitar Pro File
Data
.gts
CaptiveWorks PVR Video File
Video
.gv
GraphcViz DOT File
Text
.gvi
Google Video File
Video
.gvp
Google Video Pointer
Video
.gwi
GroupWise Database Shortcut File
Database
.gwk
GraphiCode PCB Job File
Data
.gwp
Greetings Workshop Project File
Data
.gws
GeoMedia GeoWorkspace File
Settings
.gxc
General CADD Pro Component
CAD
.gxd
General CADD Pro Drawing
CAD
.gxl
Graph Exchange Language File
Data
.gxt
Grand Theft Auto Text File
Settings
.gz
Gnu Zipped Archive
Compressed
.gzi
Unix Gzip File
Compressed
.gzip
Gnu Zipped File
Compressed