Bands by letter: G
- G3
- Gaahlskagg
- Gadget
- Gaias Pendulum
- Galactic Cowboys
- David Gallegos
- Galloglass
- Gallows for Grace
- Gallows on Galgotha
- Gamma Ray
- Gandalf
- Gangland
- Gardenian
- Gardens of Gehenna
- Garden Wall
- Gastonia
- Gates of Ishtar
- The Gathering
- GB Arts
- Geasa
- Gehenna
- General Surgery
- Genghis Khan
- Genghis Tron
- Genius
- Genocide (AUS)
- Ghamorean
- Gholgoth
- Ghoul
- Ghoulunatics
- Giant Squid
- Gillan
- Girlschool
- Glenmore
- Glenn Tipton
- Glittertind
- Güllethrasher
- Gloomy Grim
- Glory Opera
- Gnostic
- Goatlord
- Goatmoon
- Goatsnake
- Goatwhore
- God
- God Among Insects
- Goddamn Zombie
- Goddess of Desire
- God Dethroned
- Godflesh
- God Forbid
- Godgory
- Godhate
- Godiva
- Godkiller
- Godless Rising
- God Macabre
- Godsend
- Gogmagog
- Gojira
- Golden Dawn
- Goldenseed
- Alan Goldstein
- Golgotha (SPA)
- Golgotha (UK)
- Gomorrah
- Gonin-Ish
- Goratory
- Gordian Knot
- G.O.R.E
- Gorefest
- Gorelord
- Gorement
- Goresoerd
- Gorgasm (FRA)
- Gorgasm (USA)
- Gorgoroth
- Gorguts
- Gorod
- Gory Blister
- Gospel of the Horns
- Gothic Knights
- Gothic Slam
- The Gourishankar
- Gracepoint
- Grand Belial's Key
- Grand Magus
- Grannos
- Grantig
- Roland Grapow
- Grave
- Grave Digger
- Graveland
- Graven Image
- Graveworm
- Grave Worship
- Gravewurm
- Grayceon
- The Great Deceiver
- The Great Kat
- Green Carnation
- The Green Evening Requiem
- Grenade
- Grenzlinie
- Greyhaven
- Grey Skies Fallen
- Griffin
- Grim (Can)
- Grimfist
- Grimlock
- Grimm
- Grim Reaper
- Grip Inc.
- Grog
- Grotesque
- Grotesque (AUS)
- Grudge's Claw
- Gruesome Stuff Relish
- Guardians of the Flame
- Guidance Of Sin
- Guillotine
- Gun Barrel
- Guns N' Roses
- Gurd
- Gutrix
- Guttural Secrete
- GWAR
- Gwynbleidd
- G/Z/R