In February 2020, Gentile terminated his contract with Alvarado before, on 26 February, agreeing a move to Peru with Universidad San Martín.[9][10] He made his first appearance in a goalless draw with Atlético Grau on 8 March.[2] He remained for one season, scoring goals against Cusco, Sport Huancayo and Academia Cantolao as they placed eleventh in 2020.[2] At the end of the year, on 9 December, Gentile penned terms to head across the division to UT Cajamarca for 2021.[11]