Gallows Rites is a black/thrash metal project from Portugal, formed in 2023 and channeling the aggressive crossroads where black metal's darkness meets thrash's velocity. The project delivers fierce extremity from the Iberian underground.

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.

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.

Gar Bigoru is a thrash metal band from Poland, formed in 2021. They deliver aggressive thrash from the Polish underground.

Garbage Day is a thrash metal band from Hvidovre near Copenhagen, Denmark, formed in 2014, named after the iconic line from the cult horror film Silent Night, Deadly Night Part 2. The band brings fun, aggressive thrash metal to the Danish capital area.

Gardarika is a thrash/progressive metal band from Moscow, Russia, active since 2008 and blending the aggression of thrash with progressive complexity over more than fifteen years. The project's name references the Old Norse term for the lands of Rus.

Gardenia is a heavy/thrash metal band from Moscow, Russia, active since 2008 and delivering aggressive, riff-driven metal from the Russian capital for nearly two decades. The project channels classic thrash and heavy metal intensity.

Gargor is a four-piece death/thrash unit from Brussels who emerged in 2022 and have quickly built a catalog with the releases Atrox (2022), Immolate (2023), and Dance of Death (2024). Their music centers on apocalyptic and survival-themed subject matter delivered through tight, riff-driven death-thrash.

Gargouyllas is a thrash and technical death metal band from Tours, France, formed in 2006, worshipping Death, Testament, Decapitated, Suffocation, and Pantera. Their catalog spans from the 2009 demo Land of the Extremos through The Ocean of Perdition and Decadence EP (2012) to remastered material in 2022.