Siboniso Gaxa

Gaxa attended the University of Port Elizabeth, which at that time had a football team controlled by Danish side F.C. Copenhagen. However, he was not one of the three players, Elrio van Heerden, Lee Langeveldt and Bongumusa Mthethwa, who made it from the FCK-UPE Academy to F.C. Copenhagen. He is managed by ExtraTime S.L. In 2002, he moved to Supersport United, where he stayed for six seasons, before joining Mamelodi Sundowns in 2008. In 2010, he moved to Belgian club Lierse. After the 2011–12 season, he was released by the team. On 15 May 2012 Gaxa signed a three-year contract for Kaizer Chiefs with the option to renew for one year. After 99 league appearances and 1 goal for Chiefs, he was released at the end of the 2015–16 season. He signed a short-term contract with Bidvest Wits in November 2016, but was released by Bidvest Wits in October 2017 following the expiry of his deal in the summer. Gaxa signed for Ajax Cape Town in February 2018. He retired later that year after leaving Ajax Cape Town.

Gaxa made his international debut in a 2006 FIFA World Cup qualifier against Cape Verde on 4 June 2005. He was part of South Africa's squad at the 2005 CONCACAF Gold Cup, 2006 African Cup of Nations, 2009 FIFA Confederations Cup, 2010 FIFA World Cup and 2013 African Cup of Nations.

Supersport United

MTN 8 – 2004 Nedbank Cup – 2005 Premier Soccer League – 2007/08

Kaizer Chiefs

Premier Soccer League – 2012/13 Premier Soccer League – 2014/15

Nedbank Cup – 2013 Carling Black Label – 2013 MTN 8 – 2014

Bidvest Wits

Premier Soccer League – 2016/17 MTN 8 – 2016