Career
Gallacher started his career with Rangers. He joined Cowdenbeath, then in the Scottish Third Division on 1 September 2008. In 2010, Gallacher signed a six-month loan deal with Forfar Athletic which was later extended until the end of the season.
In September 2013, Gallacher signed on loan for Airdrieonians.
In July 2014, Gallacher signed for Scottish Championship side Heart of Midlothian on a two-year deal. On 10 September 2015, Gallacher moved on loan to Forfar Athletic for a second time, joining on a short term deal.
On 14 January 2016, Gallacher signed a contract with Alloa until the end of the season, after leaving Hearts by mutual consent.
