List of bands (14):

Grave Digger
Green Carnation
Green Day
Green Lung
Grey Daze
Gruesome
Guilt Trip
Guilt Trip
Guns N'Roses
Gunshine
Gus G
Gutter Creek
Haken
Halestorm
Halocene
Hammerfall
Hariot
Harlott
Hatebreed
Hatriot