On 21 May 2019, McGing made his professional debut in the
2019 AFC Champions League in a group stage match against
Kawasaki Frontale. On 23 November 2019, McGing made his
A-League debut, coming on as a sub for the
Wellington Phoenix in their 2–1 win over the
Brisbane Roar. It was the Phoenix first win of the
2019–20 season. On 2 November 2020, McGing signed a one-year contract to stay on with the Phoenix. In November 2021, McGing signed a short-term contract with
Sydney FC. Following his release from Sydney after only making a single appearance, McGing travelled to Ireland, signing a contract with
Finn Harps in the
League of Ireland First Division. However he would only go on to make 5 appearances at the club, before returning home and signing with
Marconi Stallions for the
2023 National Premier Leagues NSW season. In December 2023, Liam signed with
Sydney United 58 for the 2024
National Premier Leagues NSW season. ==Personal life==