Standing at 2.01 m (6 ft 7 in),[1] he plays at the shooting guard and small forward positions.

[2] In December 2011, Gentile left Treviso Basket and signed a four-year deal with Olimpia Milano.

[3] In 2013–14, Gentile had a break-out season, averaging 11.4 points, 2.4 rebounds and 2.3 assists over 21 games in the EuroLeague.

[7] He was released by Panathinaikos in March 2017, and he finished the 2016–17 season by playing on loan for Hapoel Jerusalem in the Israeli Super League, and preparing for the upcoming EuroBasket 2017 tournament.

[9] On December 19, 2016, Gentile then joined the Greek club Panathinaikos, on a loan from Olimpia Milano, for the rest of the season.

[19] On October 30, 2018, Gentile signed a one-year deal with Spanish club Movistar Estudiantes.

[22] On September 29, 2020, he has signed a 3 months deal for returning to Movistar Estudiantes of the Liga ACB.

[23] On June 25, 2021, Gentile signed with Pallacanestro Varese of the Italian Lega Basket Serie A (LBA).

[31] Gentile started in the youth age categories of Italy's junior national teams, first for the Under-16's at the 2008 FIBA Europe Under-16 Championship, and then notably winning the silver medal with the Under-20s at the 2011 FIBA Europe Under-20 Championship.