Groundsleeper are a black/doom metal band from Ried im Innkreis in Upper Austria, active in the regional underground metal scene. The band operates as an independent four-piece and has maintained a presence primarily through local and Austrian metal circuits.

Groundswell is a deathcore/metalcore band from Nantes, France, formed in 2015. They deliver heavy breakdowns and aggressive vocals from the Loire-Atlantique capital's active heavy music scene.

Grove Street is a metalcore/crossover band from Southampton, active since 2013. They blend metalcore heaviness with crossover energy from the Hampshire coast.

Grover is a groove/death metal band from Moscow, Russia, active since 2012 and delivering over a decade of rhythmic, crushing heaviness from the Russian capital. The project channels the headbanging immediacy of groove metal through death metal weight.

Growing Horns is a doom/sludge metal band from Kortrijk, Belgium, formed in 2019, whose debut The Nobility of Pain (2019) and follow-up The Essence of Suffering (2025) deal in crushing, emotionally raw doom with bestial and mournful vocal textures. The Essence of Suffering was pressed on limited 180-gram vinyl at Dunk! pressing.

Growing Titans is a Portuguese heavy/progressive metal band formed in 2015. They combine the grandeur of traditional heavy metal with progressive complexity.

Grown Below is a post-metal band from Mortsel near Antwerp, formed in 2011 from the remains of a band called Timer, influenced by Cult of Luna, Isis, and Tool. They signed to Slow Burn Records and released The Long Now in 2011, followed by The Other Sight, pursuing a dense, evolved post-metal sound.

Grox is a project from Veszprém, Hungary, that evolved from ambient origins in 2012 into black metal territory, tracing an arc from ethereal atmospherics to aggressive extremity. The project's genre evolution reflects a restless creative spirit.

Groza is a black metal band from Muhldorf am Inn, Germany, formed in 2018, whose name means "thunderstorm" in several Slavic languages. The band has established themselves as a notable act in the Bavarian black metal scene.