Active since 2003 in Neuhofen an der Krems, GröBär play melodic death and thrash metal under the tongue-in-cheek banner of Bären-Metal—bear metal—complete with bear-themed member aliases. Their discography includes the 2014 album GROB and the 2019 record NICEANTSNOW, which won praise for its energetic melodic death metal approach.

Guarreria is a death metal band from Barcelona, Spain, active since 2012, delivering raw and punishing extreme metal rooted in the city's thriving underground scene. Their sound channels the visceral aggression and unrelenting heaviness central to the death metal tradition.

Guderrha is a death metal band from Catanzaro in Calabria, formed in 2024. They bring death metal aggression to the capital of the southernmost mainland Italian region.

Guide to Oblivion is a melodic thrash/death metal and metalcore band from Rottenacker and Ulm, Germany, formed in 2013, blending multiple aggressive styles into an accessible yet heavy package. The band has maintained over a decade of activity in the Swabian metal scene.

Guilles is an extreme metal band from Castellón de la Plana, Spain, formed in 2000 under the name Guilles de Rais and founded by guitarist Sevi, with seven albums to their name including ¿Quién Puede Matar a un Niño? and Harvest of Grey Days. Their sound is defined by a restless creative search across black and death metal territory, evolving substantially with each release.

Guillotina is a Barcelona-based death metal band formed in 2019, self-described as 'd-beat infused death metal,' with releases including their self-titled debut, Mil Cortes, and Primera Sang. They have built an active international touring profile with dates spanning Mexico and the UK.

Guillty is a death metal/grindcore band from Leeds, formed in 2021. They deliver grinding death metal from the West Yorkshire city.

Guilty of Reason is a metal band from Strasbourg, France, spreading heavy/thrash/death metal and hardcore since 2004 with unwavering intensity. Their album Shades of Sanity (2013) was produced by Anthony Chognard and mastered at Kohlekeller Studios in Germany.

Gullinbursti is a French melodic death metal project formed in 2020, named after the golden boar of Norse mythology and channeling epic melodic sensibilities into aggressive death metal. The project draws from both Scandinavian melodeath traditions and mythological themes.