Guitar Heroes is a power metal and heavy metal band from Helsinki, Finland, formed in 2016, delivering guitar-driven anthemic metal with the soaring energy and melodic precision the power metal genre demands. Their sound celebrates the instrument at the heart of heavy metal.

Gulah is a heavy metal and thrash band from the small town of Villardompardo in Jaén, Spain, formed in 2017, channeling old-school aggression through ripping riffs and raw energy. Their sound pays homage to the classic thrash and heavy metal traditions with a distinctly Spanish underground sensibility.

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.

Gumbody is a thrash/heavy metal band from Horsens, Denmark, formed in 2020, delivering aggressive metal from the east Jutland port city. The band combines thrash energy with classic heavy metal foundations.

Gun Barrel is a heavy/power metal band from Cologne, Germany, formed in 2001, delivering classic German-style power metal with heavy metal grit from the Rhineland. The band has built over two decades of traditional metal output.

Gunjack is a heavy/speed metal band from Milan, formed in 2022. They deliver high-velocity speed metal and classic heavy metal from the Lombard capital.

Gunslinger is a NWOBHM/heavy metal band from Ipswich in Suffolk, active since 2007. They channel the classic spirit of British heavy metal from the East Anglian county town.

Gunsmoke is a heavy metal band from La Spezia on the Ligurian coast, active since 2010. They deliver riff-driven heavy metal from the Gulf of Poets.

Gus G. is a heavy metal/hard rock/shred solo artist from Thessaloniki, internationally renowned as the guitarist of Firewind and former touring guitarist for Ozzy Osbourne. His solo work showcases blistering guitar virtuosity across heavy metal and hard rock from one of Greece's most famous metal exports.