On 30 August 2019, Gilroy signed with North Melbourne as a rookie during the 2019 rookie signing period, joining her fellow countrywoman Mairéad Seoighe at the club.[1][3][4] Quickly establishing herself as a fan-favourite,[5] Gilroy made 7 appearances for the Kangaroos in 2020, averaging almost 10 disposals a game, and finished fifth in the best-and-fairest count.[6] It was revealed she signed on with the club for two more seasons on 17 June 2021, tying her to the club until the end of 2023.[7] In May 2022, Gilroy surprisingly joined expansion club Hawthorn, after telling North Melbourne she would recommit to them.[8]
A Killala native, Gilroy attended St. Patrick's College, Lacken Cross[13][14] and played youth football for Killala AFC. In February 2010, she helped St. Patrick's College win the UmbroFAI Schools Senior B Girls All-Ireland Final against St Kilian's German School.[15]
Club
In 2011, Gilroy signed for Castlebar Celtic, one of the six teams that competed in the WNL's inaugural 2011–12 season, and stayed at the club until 2014.[16]