Born in Rome, Gemma first worked as a stuntman, then was offered real acting parts by director Duccio Tessari, starting with the film Arrivano i titani (1962). He also made an appearance in Luchino Visconti's Il Gattopardo as Garibaldi's General.
Gemma, a native of Rome, began his career as a stuntman before landing acting roles from director Duccio Tessari, starting with the film "Arrivano i titani" (1962). He also appeared in Luchino Visconti's "Il Gattopardo," portraying Garibaldi's General.