Galvão is a post-black metal project from Évora, Portugal, active since 2021 and crafting atmospheric, expansive black metal from this ancient Alentejo city. The project blends post-metal's dynamic scope with black metal's intensity.

Gama Bomb is a thrash metal band from Newry, Northern Ireland, formed in 2008 and signed to Prosthetic Records. With their humorous, horror-and-sci-fi-themed approach — self-described as 'thrash metal from Ireland, underpants from China' — the five-piece has become one of the most internationally recognized Irish metal exports.

Gamarra is a death metal band from Cambridge, formed in 2020. They deliver death metal from one of England's most academically prestigious cities.

Gambanteinn is a black metal band from Turku, Finland, active since 2010, describing their sound as 'Wrathful Thursian Black Metal.' Their debut Nielevä Pimeys (2014) was written and performed by Þjazi with guitars by J. Riihimäki, channeling Nordic fury through five tracks of fierce, mythologically rooted black metal.

Gambit is a melodic power metal band from Aalen, Germany, formed in 2019, channeling the European power metal tradition of soaring melodies and dynamic arrangements. The band operates in the Swabian region of Baden-Wurttemberg.

Gamborimbo is a goregrind trio from Osnabruck, Germany, formed in 2022, whose debut Fiesta Mexicana (2022) packs thirteen tracks of humor-laced goregrind into thirty-six minutes. The three-piece of Stefan (drums), Paddy (guitar), and Chewie (vocals) self-produced the album.

Gamdøden is a stoner/doom/sludge metal band from Helsingborg, Sweden, formed in 2022 and dealing in heavy, low-end punishment from the Øresund coast. The project merges three crushing genres into a single monolithic assault.

Game Zero is a hard rock/heavy metal band from Rome, formed in 2015. They deliver energetic heavy metal and hard rock from the Italian capital.

Gamma Ray is a power/speed metal band from Hamburg, Germany, formed in 2015, carrying forward the tradition of high-speed European power metal that Hamburg is famous for. The band delivers velocity-driven metal with melodic precision.