Grümphrö are a Viennese black metal project whose album Ußtrieba features the surrealist track title The frail figure decaying whilst bathing in raspberries, signaling an eccentric, anti-conventional approach to the genre. The project's themes incorporate anti-fascist politics, Tolkien mythology, and invented fictional narratives.

GSTNK is a black metal and punk hybrid from Hagen in the Ruhr Valley, Germany, formed in 2017, stripping consonants from the German word Gestank ("stench") as their name. The project fuses black metal's tremolo attack with punk's raw directness.

GuardianSorrow is a prolific Spanish black metal project active since 2017, with an extensive solo discography of over fifteen releases including A Mad King's Dream, The Secret Temple of Silence, and the Mythical Outlands series. The project explores dark fantasy and melancholic themes through atmospheric, introspective black metal.

Gudlos is a black metal project from Brno, Czech Republic, formed in 2015, channeling chaotic and kvlt black metal with existential and spiritual themes. The project operates in the lo-fi, underground end of Czech black metal.

Guignol Noir is a Swiss black metal duo from Basel, formed in winter 2007 by Cheib and Schiach and associated with the Milk ov Madness collective. Their releases Ritual ov Initiation and Mantric Malediction channel dark, ritualistic black metal with an occult, theatrical edge befitting their Grand Guignol-inspired name.

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.

Guldagnir is a black/doom metal and ambient project from Saint Petersburg, Russia, active since 2019 and merging the darkness of black metal with doom's oppressive weight and ambient textures. The project creates immersive, heavy sonic landscapes.

Guldan is a Bavarian black metal project formed in 2021, channeling dark, arcane black metal from southern Germany. The project operates in the tradition of the Bavarian underground.

Guldsjakal is a heavy/black/speed metal band from Copenhagen, Denmark, formed in 2020, whose name means "golden jackal" in Danish. The band blends classic heavy metal and speed metal with black metal intensity.