G.P.I. is a death/thrash/industrial metal band from Coleraine in Northern Ireland, active since 2006. They fuse industrial textures with death and thrash metal aggression from the north coast of Ireland.

G.R.I.M. is a doom metal band from Oslo, formed in 2019. They deliver crushing doom from the Norwegian capital.

G.R.I.T.H. is a progressive death metal band from Veliky Novgorod, Russia, active since 2011 and crafting technically ambitious death metal from one of Russia's oldest cities. The project combines progressive complexity with extreme metal ferocity.

G.T.I. is a death metal and grindcore band from Nantes, France, formed in 2022, channeling fast, aggressive extreme metal with a punk-infused ethos. Their sound blends deathgrind's brutality with the raw, unpolished energy of the underground.

G.Z.P is a goregrind duo from Marne La Vallée near Paris, France, formed in 2018, consisting of Ré on guitar, bass, and vocals and Loïc on drums. Their 2021 album Brain Bucket features thirteen tracks of extreme goregrind with guest vocalists from Brutal Sphincter, Pendrak, and Holy Cost.

G2E is a black metal, ambient, and electronic project from Reykjavík, Iceland, active since 2020 and blending the cold atmosphere of Icelandic black metal with ambient textures and electronic elements. The project pushes genre boundaries through experimental cross-pollination.

Gaahls Wyrd is a black/heavy metal band from Bergen, Norway, formed in 2019. Led by former Gorgoroth vocalist Gaahl, the project merges traditional black metal with heavy metal elements, channeling the legendary intensity of one of Norwegian black metal's most iconic and controversial figures.

Gaai is a psychedelic stoner metal/rock band from Amsterdam, formed in 2020. They deliver hazy, psychedelic stoner metal from the Dutch capital.

Gaarm is a black metal band from Moscow, Russia, active since 2018 and channeling raw, aggressive black metal from the Russian capital. The project adds to Moscow's deep underground black metal scene.