FVG is a sludge/doom/post-metal band from Perugia, Italy, formed in 2025. They represent the newest generation of Umbrian heavy music, blending sludge weight with doom and post-metal atmospherics.

Gagarin is a sludge/doom/post-metal band from Ponferrada, Spain, formed in 2013, named after the first human in space. The band channels cosmic heaviness through dense, atmospheric sludge and doom from the Leon province of Castile.

Gagulta is a sludge metal band from Athens, Greece, formed in 2019. They deliver crushing sludge from the Greek capital's growing heavy music underground.

Gallons of Mud is a stoner/sludge/doom metal band from Cologne, Germany, formed in 2011, driven by a self-described passion for Sabbath riffs, slow movements, and infectious grooves. Their 2018 full-length God Bless & Fuck You was recorded and mixed by bassist Steve Albino, delivering seven tracks of doomy, groove-laden stoner metal.

Gallowhead is a three-piece heavy band from Feldkirch in westernmost Austria, dealing in rumbling sludge and post-metal built on distorted bass, grooved-out rhythms, and a mix of shouts and growls. They have released four records including the self-titled debut, Karōshi, and Comfort in Discomfort (2024), with album titles probing psychological weight and existential burnout.

Galvano is a progressive sludge metal band from Gothenburg, Sweden, active since 2012 and crafting ambitious, technically sophisticated sludge from Sweden's metal capital. The project pushes sludge metal into progressive territory.

Gamdøden is a stoner/doom/sludge metal band from Helsingborg, Sweden, formed in 2022 and dealing in heavy, low-end punishment from the Øresund coast. The project merges three crushing genres into a single monolithic assault.

Gangrened is a doom and sludge metal band from Kokkola, Finland, active since 2013, creating 'heavy, noisy, avant-garde and atmospheric sounds' that blur the lines between doom, ambient, and noise. Their releases include Ambient Doom Dream, We Are Nothing, and a split with Hipoxia, reflecting an experimental and genre-defying approach to extreme heaviness.

Ganjubatronic is a sludge/drone/doom metal band from Warsaw, formed in 2023. They deliver crushing, slow-motion heaviness from the Polish capital.