Career
Gianni started his career at aged 18 in 2000, making his professional debut in a 1–0 loss against Rosario Central. After of his goal against Banfield, he again to score in the last week of the tournament, scoring the only goal of the match at 53rd minute against Colón de Santa Fe. Despite of his good performance in the Clausura, he only played two matches in the Torneo Apertura.
During the season 2007 and the Clausura 2008, he was regular in the team, playing the majority of the games as a substitute and being titular in few occasions.
On 26 June 2008, Gianni was loaned to the Chilean team Universidad Católica, he arrived to the precordilleran club with the mission of replace to his countrymen Darío Bottinelli. He also was recommended to the coach Fernando Carvallo by the former football player Jorge Quinteros, who had a great pass in this team in 2005.
Quinteros including talked with Gianni and was very eager to play for Católica, affirmed the former striker of the University of California.