Grietas are an alternative metal band from Reconquista, Santa Fe, Argentina, with Nicolás "Cabeza" Saucedo (guitar and lead vocals) as the sole continuously active member alongside Guillermo Tortul (bass) and Facundo Lopez (drums). Their second studio album "Secuelas" was released in late 2020, recorded at Coda Studio in Reconquista and mixed and mastered by Lian Gerbino at White Door Studio in Malmö, Sweden. The title track features guest appearances from Fabricio Faccioli (ex-Vorgrum, ex-Treno) and Lian Gerbino of Tersivel.

Grinding Reaction is a thrash metal and hardcore band from Diadema, in greater São Paulo, Brazil. The band blends old-school and new-school hardcore with thrash and groove metal while tackling political and social themes, and has released material including the EP Tempo, Persistência e Fúria and a full-length album featuring fifteen original tracks.

Grosstracktor is a groove metal band from Lota, Bio-Bío, Chile. The band's name references the Grosstraktor prototype medium tanks built by German manufacturers Rheinmetall-Borsig, Krupp, and Daimler for the Weimar Republic in violation of the Treaty of Versailles.