Gigafauna is a progressive sludge metal band from Uppsala, Sweden, active since 2018 and crafting ambitious, dynamic sludge from this historic university city. The project pushes sludge metal into progressive territory.

Ginger Brain Man is a solo extreme metal project from Caen, France, formed in 2011, blending death metal, grindcore, black metal, noise, and psychedelic rock into a dark, avant-garde hybrid. The eleven-track debut Terreurs Nocturnes delivers surreal, genre-defying extreme metal across forty-two minutes.

Giotopia is a symphonic progressive metal project from Beveren, Belgium, built around elaborate fantasy narratives told through music, with releases titled A Fantasy Tale on Music parts I and II, Trinity of Evil, and Egar's Return. The project has remastered earlier material in 2022-2023, refining a catalog of cinematic, story-driven metal.

Giuseppe Zaupa is a progressive metal solo artist from Arzignano in the Vicenza province, active since 2020. He channels technically sophisticated progressive metal from the Veneto region.

Glassgod is a progressive symphonic metal project from Leipzig, Germany, formed in 2023, blending complex progressive structures with orchestral symphonic elements. The project is a new addition to Leipzig's historically rich music scene.

Glowing Ice is a progressive heavy metal band from Palermo, Sicily, active since 2013. They bring progressive metal ambition to the Sicilian capital.

Gnadab is a progressive death metal/deathcore band from Alphen aan den Rijn in South Holland, active since 2011. They blend technical death metal with deathcore from the Randstad urban ring.

GodFuck is a black metal, death metal, and progressive metal project from Outokumpu, Finland, formed in 2019, delivering epic-length compositions across their debut Summoning the Firebreath Deamon of Hell. The album spans eight tracks over seventy-one minutes, featuring multi-part structures that blend black and death metal with progressive complexity.

Godgray is a progressive/groove/thrash metal band from Germany, formed in 2011, combining complex progressive structures with groove metal's rhythmic punch and thrash metal's speed. The band delivers technically ambitious metal with dynamic, multi-layered compositions.