List of bands (14):

Godeth
Godslave
Godsmack
Godsnake
Gojira
Gorgonzolla
Gorod
Gothminister
Gotthard
Graceless
Grailknights
Grand Magus
Grave Digger
Green Carnation
Green Day
Green Lung
Grey Daze
Gruesome
Guilt Trip
Guilt Trip