Gartraada is a band from Novomoskovsk, Russia, that evolved from atmospheric black metal origins in 2009 into melodic death metal territory, tracing an arc across extreme metal genres. The project's genre evolution reflects a restless creative vision.

Garum is a folk metal band from Pescara on the Adriatic coast of Abruzzo, formed in 2020. Named after the fermented fish sauce of ancient Rome, they channel Italian antiquity through folk metal.

Gas Axe is a sludge/doom metal band from Wales, formed in 2014. They deliver crushing sludge and doom metal from the Welsh underground.

Gas Giant is a stoner/doom metal band from Amsterdam, active since 2000. Over two-and-a-half decades of massive stoner doom from the Dutch capital make them one of the country's most enduring heavy acts.

Gasangriff is a black metal project from Ringsted, Denmark, formed in 2019, whose name means "gas attack" in German. The project channels aggressive, war-themed black metal from the Danish island of Zealand.

Gasbrand is a German black metal duo from Marburg (Franconia), formed in 2020, with Azaziel handling vocals, guitars, and bass while F.N. joined on drums in autumn 2020. Their discography includes Of Death and Despair (2020), Dishonor, Madness and Calamity (2022), and Fading Away in Nothingness (2025).

Gash Faith is an industrial/death metal band from Warsaw, formed in 2019. They merge industrial textures with death metal from the Polish capital.

Gashkelah is a black metal project from Eindhoven, formed in 2020. They deliver black metal from the city that hosts Europe's premier underground metal festival, Roadburn.

Gaskammer is a black metal project from Sandanski, Bulgaria, formed in 2023, operating in the raw end of the black metal spectrum. The project channels a stripped-down, underground approach to the genre.