[2] His performances eventually led to his being crowned the New South Wales Premier League player of the year, winning the Gold Medal award for the competition.

[3] Gan was than signed by Sydney FC for their inaugural National Youth League squad ahead of competition from rival A-League clubs.

This goal gave Sydney FC a 2–0 win over Wellington and placed them on the top of the table, leapfrogging Gold Coast United.

[11] Gan signed for Bonnyrigg White Eagles in the NSW Premier League,[12] and made his debut in the Round 15 game against Sydney United.

[13] On 17 November 2011, Gan moved to Malaysian club, Sabah as one of the two foreign players allowed in the 2012 Malaysia Super League.

[20] In September 2016, Brendan suffered another ACL injury, this time in his left knee which keep him out for 10 months, ruling him out for the 2016 AFF Championship where he was released by the club at the end of 2016.

[citation needed] On 1 December 2019, Gan officially joined Malaysia Super League club Selangor.

[citation needed] Gan later debuted for Malaysia national team on 24 March 2016 in a 2018 FIFA World Cup qualification match against Saudi Arabia.