G.R.I.T.H. is a progressive death metal band from Veliky Novgorod, Russia, active since 2011 and crafting technically ambitious death metal from one of Russia's oldest cities. The project combines progressive complexity with extreme metal ferocity.

Gabriels is a melodic heavy/progressive metal band from Messina in Sicily, formed in 2018. They deliver technically accomplished melodic metal from the Strait of Messina.

Galaktik Cancer Squad is a one-man progressive black metal project from Hamburg, Germany, founded by Arwohn in 2011, blending aggressive post-black metal with cacophonous vocals and moments of soaring post-rock melancholy. The project released four albums in rapid succession from 2012 to 2013, with Ghost Light marking the first physical release through Hypnotic Dirge Records.

Galamakor is a French progressive and technical death metal project formed in 2023, whose debut EP Octopoïd Whispers delivers seven tracks of intricate, composition-driven extreme metal. Track titles like Systemic Nightmare of the Conqueror and Abyssal Decomposition reflect their ambitious approach to progressive death metal.

Galaxis is a progressive metal project from Zlatitsa, Bulgaria, formed in 2022, exploring cosmic and philosophical themes through psychedelic-inflected prog metal. Their releases include Compressed to the Point of Human, Potential Renaissance, and Hello from the Future.

Gallina Negra is a progressive thrash metal band from Tiszaujvaros, Hungary, active since 1999. Over a quarter century, they have delivered technically ambitious thrash metal from the industrial city in eastern Hungary.

please update this band

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.

Gandillion is a symphonic/progressive gothic metal band from the Zoetermeer/Gouda area, formed in 2014. They deliver elaborate symphonic gothic metal from the South Holland urban corridor.