Dario Oliviero (born 12 July 1972), better known by his stage name Gabriel Garko, is an Italian actor and former fashion model.

He started his career at the end of the 1990s but achieved a breakthrough in 2006 with the television drama L'onore e il rispetto where he plays the mob boss Tonio Fortebracci.

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 e il rispetto (2006), a television mini-series where he portrayed a ruthless fictitious Mafia boss Tonio Fortebracci.

In 2010, he starred in the main role of Nito Valdi in another mini-series Il peccato e la vergogna, which was set in Italy during World War II.