Born in Turin, Piedmont, Italy to a Venetian father and Sicilian mother, Garko was raised in the nearby suburb of Settimo Torinese. His film credits include Callas Forever (2002), and L'Onore and il Rispetto (2006) a television mini-series where he portrayed a ruthless fictitious Mafia boss "Tonio Fortebracci". In Tinto Brass' Senso '45 he appears full-frontal naked in a scene when he goes to the sea with lead actress Anna Galiena.  He starred alongside actresses Serena Autieri and Manuela Arcuri. In 2010 he had the main role of "Nito Valdi" in another mini-series Il peccato e la vergogna, which was set in Italy during World War II. Manuela Arcuri was his co-star in this series as well. In 2011, he starred in the television mini-series Viso d'angelo (Angel Face), a police thriller.
^"Ardant's passion drives Zeffirelli's fictional 'Callas Forever' " (20 May 2005) Times - Picayune, New Orleans
^"El malo de la película: Este actor italiano denuncia agresiones y amenazas de telespectadores que creen que es realmente tan vil y malvado como los personajes que interpreta" (24 January 2014) El Mundo, Madrid (Spanish)