 In February 2012 he joined League Two side Crawley Town on loan as back up to Michael Kuipers, following an injury to Scott Shearer.On 3 May 2012, Gilmartin was one of four players to be released by Watford after their contracts expired.Gilmartin signed a two-year contract with League Two side Plymouth Argyle in July 2012, and made 16 appearances in all competitions.