Gemma's playing career started with Ballincollig in 2004 and she went on to win two Women's All-Ireland medals with the club and captained the side in the 2009/10 season. She also won three interprovincial titles with the Munster Women.
Her coaching and management experience has seen her combine playing and managing roles at Ballincollig. In addition she coached the Munster Under-18 Girls for two seasons and managed the Munster Under-19 Girls in the 2010/11 season.
In 2012 Gemma was also appointed manager of the Women's Sevens Squad which qualified for the IRB Rugby World Cup Sevens in Moscow for 2013.