Gaia Epicus is a power metal band from Trondheim, active since 2003. Over two decades of power metal from the historic Norwegian capital make them one of the country's most enduring acts in a genre dominated by Finnish and German bands.

Gaias Lycan is a power/thrash metal band from Athens, formed in 2017. They fuse the melodic grandeur of power metal with thrash aggression from the Greek capital.

Gain is a Danish heavy metal band formed in 2018, delivering classic heavy metal from Denmark's metal-rich scene. The band works in the tradition of Scandinavian heavy metal.

Gaina is a heavy/speed metal band from Moscow, Russia, active since 2016 and delivering high-velocity riffs and classic metal energy. The project channels the excitement of speed metal through a heavy metal framework.

Gaiseric is a solo atmospheric and post-black metal project from Aix-en-Provence, France, formed in 2021, describing the work as 'a melancholic journey' with influences from Lascar, Unreqvited, and Eldamar. Releases include the album Fog in the Distance and the single A Path Through the Autumn Leaves.

Gaistaz is a blackened gothic/doom metal band from Gelderland, formed in 2019. They blend blackened atmosphere with gothic doom from the eastern Dutch province.

Gaktungar is a black metal band from Vladivostok in the Russian Far East, active since 2012 and forging extreme metal at the edge of the Pacific. The project channels the isolation and harshness of Russia's easternmost major city.

Galactic Cannibalism is a one-man cosmic black metal project from Seinäjoki, Finland, created by Henrik Pouttu, who handles all composition, performance, and artwork. The 2023 debut Planet Eater is a sci-fi concept album exploring themes of time, isolation, and cosmic horror across ten tracks of atmospheric and progressive black metal.

Galactomyces is a slam and brutal death metal band from Rostov-on-Don, Russia, formed in 2024 and delivering gut-churning brutality from southern Russia. The project merges slam's guttural weight with deathcore breakdowns.