Gangrena Gasosa is a thrash metal and crossover band from Rio de Janeiro, Brazil, who brand their style as "Saravá Metal" — a fusion of metal and hardcore with Umbanda and Afro-Brazilian religious imagery. On stage, each member portrays a specific Afro-Brazilian deity or spirit, making the band's live presentation unique within the Brazilian metal scene. The band released the LP Welcome to Terreiro in 1995 and has remained active for over three decades, issuing the album Figa of the Dark in 2024.

Gatica are a thrash/grindcore band from Rosario, Argentina who launched in 2020 with the 15-track debut Matando Chetos (May 2020), followed swiftly by the equally frenetic Barbarie mata galán (March 2021). Both records blend politically charged lyrics with short, high-speed songs in the tradition of extreme crossover grindcore.

General Kroll are a crossover thrash band from Rosario, Santa Fe, Argentina, formed in 2015. Their seven-track Demo Ensayo 2015 was recorded, mixed, and mastered by Augusto Brasseur at Sala HUM in Rosario and released in June 2015, documenting an early sound built around fast, hardcore-inflected riffs and sardonic song titles.

Gladiator is a thrash metal band from Porto Alegre, Rio Grande do Sul, Brazil, originally formed in the late 1980s and regarded as one of the pioneers of the genre in their region. The band's first full-length album, "Dreadful Dreams," was recorded at Signus Studio in Porto Alegre and released in 1992 on Whiplash Records, later reissued in a remastered edition on Rising Records. The band reformed in 2010 and has continued to be active within the Brazilian thrash metal scene.

Gladio Tempus is a death/thrash metal band from Goiânia, Brazil, founded in 2021 by Nicholas de Macedo (vocals and rhythm guitars), Geovani Maia (lead guitars), Alper Basbug (bass), and Eduardo Lemes (drums). The band cites Slayer, Sepultura, Obituary, and Sodom as primary influences, and released their debut album "FAUDA" on January 10, 2024. Their brutal thrash approach places them in the tradition of aggressive Brazilian extreme metal.

Glote is a crossover thrash band from Santos, São Paulo, formed in 2023, with a lineup of Felipe Gameiro on vocals, Bruno Cabaleiro on guitars, Muxu on bass, and Lucas Santos on drums. Their debut EP The Lost Years (2023), recorded at Estúdio Warzone in Santos, collects five tracks written between 2019 and 2022 during the COVID-19 pandemic. The release tackles Brazilian social issues including police violence, the precarious health system, and the rise of fascism, firmly in the tradition of politically charged crossover thrash.

Gnose is a thrash/hardcore band from Betim, Minas Gerais, founded in 2021 by guitarist and vocalist Gustavo Ferreira. The band released the EP Anarco Politicismo in 2022 and the full-length Manifesto Periférico in 2024, both addressing themes of state violence, hypocrisy, and societal injustice. Their confrontational approach aligns them with the politically engaged wing of Brazilian crossover hardcore.

Goat Command were a black/thrash metal band from Constitución, Maule, Chile, active from 2010 to 2014 and released through the underground label Headbanging on the Pentagram. The band drew on the violent, chaotic energy typical of South American black/thrash, with lyrical themes centered on blood, violence, and rage.

Godhelmet is a one-man thrash metal project based in São Paulo, Brazil, active since 2013. The project has released a series of self-produced demos including "Runaway World" (2013), "Poison Mind" (2015), "Butterfly Bomb" (2017), and "I Am Dust" (2022).