Giancarlo Stefano Mesto is an Italian-Australian soccer player who is a youth player for Wellington Phoenix born in 1996.

2002-2011 Blacktown FC

2011-2012 Lazio SS

2012-2013 Cagliari

2013- Wellington Phoenix

His brothers are also involved in soccer, Fabio Mesto, Luigi Mesto and Orlando Mesto.

He joined Blacktown aged 6 and left aged 15 to join Lazio. He was schooled in Italy whilst at Lazio and Cagliari. He then joined Wellington and gave up school.