Gruesome Gertie is an atmospheric doom and post-metal band from Wrocław, Poland, active since 2017 and crafting expansive, emotionally charged heaviness. The project blends doom's crushing weight with post-metal's dynamic, cinematic scope.

Gruesome Pledge is a death metal band from Rennes in Brittany, formed in 2025. They represent the newest generation of Breton death metal, bringing raw aggression to the Ille-et-Vilaine capital.

Gruesome Stuff Relish is a death metal and goregrind band from Mieres in Asturias, Spain, active since 2002, blending extreme metal with B-movie horror imagery across releases like Teenage Giallo Grind (2002) and Horror Rises From The Tomb (2008). Their sound has been described as 'groovin' cannibalistic bloodthirst,' pairing crushing riffs with schlocky horror film aesthetics.

Gruff is a melodic death metal band with gothic influences from Hamburg, Germany, formed in 2018, combining the Gothenburg melodeath template with dark, atmospheric gothic metal elements. The band brings a moody, layered approach to Hamburg's extreme metal scene.

Grufflo is a thrash/groove metal band from Bonn, Germany, formed in 2023, combining thrash metal's speed with groove metal's rhythmic heaviness. The band is a newer addition to the Rhine Valley metal scene.

Gruft is a heavy metal band from Buhl in Baden, Germany, formed in 2016, whose name means "crypt" or "vault" in German. The band delivers classic heavy metal from the southwestern German countryside.

Gruiiiik is a Parisian goregrind project active since 2020, embracing a self-described "no lyrics, no talent" ethos of raw, unpolished extremity. Their releases include Demo 2020 and Ça Parle de Ta Mère!, delivering irreverent grind chaos.

Grummelgnom is an Upper Austrian solo metal project characterized by its creator as critical, angry, and unhinged—a self-described metal project from the forest with a pronounced sociopolitical edge. Releases including Kunst statt Krieg (Art Instead of War), Wut 2005–2009, and Waldwut in fünf Akten trace a decade-long output of avant-garde metal built on protest and social critique.

Grumo is a grindcore/death metal band from Modena, formed in 2015, having evolved from earlier goregrind/noise origins. Their shift toward more structured grindcore reflects a maturing approach to extreme music.