The band's debut album, Na svom talasu (1980), presented a combination of diverse musical influences, primarily hard rock, but also power pop, ska and reggae.

[1] The debut album Na svom talasu (Riding Our Own Wave), released by PGP-RTB in 1980, presented a combination of diverse musical influences – hard rock, power pop, ska and reggae.

[1] In 1981, the band, consisting of Kostić, Kuštrin and Kojić only, released the single "Sa tobom, bez tebe" ("With You, Without You"), with "Bekstvo" ("Escape") as the B-side.

The album featured prominent tracks "Bekstvo" ("Escape"), "Nove vrednosti" ("New Values") and "Složena procedura opstanka" ("A Complex Survival Procedure"), mainly ska oriented.

[1] Guest appearances featured Vuk Vujačić on saxophone and Disciplina Kičme frontman Dušan Kojić "Koja" on backing vocals.

He had also made a guest appearance on the Bebi Dol album Ruže i krv, playing guitar and bass,[2] and wrote the music for Jovan Jovanović's film Pejzaži u magli (Fogscapes).

[1] Serbian alternative rock band Sinestezija released a cover of Grupa I song "Promene" ("Changes") on their 2016 album Snovi o slobodi (Dreams of Freedom).