Career
He plays Gaelic football for Louth and association football for Dundalk. Born in Dundalk, Louth, Gallagher started playing as a goalkeeper for Gaelic sides, Cooley Kickhams and Louth Minors and joined Louth Seniors in 2010 as a goalkeeper and also in his school days for Saint Marys College in Dundalk. He joined Dundalk in January 2006 from University College Dublin. He was signed for his third spell at the club by Seán Connor in March 2009.