[10] On 16 October 2018, Gilbert re-signed with the North Queensland Cowboys, moving up to their NRL squad on a one-year development deal.
[15] Following his second NRL game, Gilbert was suspended for three weeks for a crusher tackle on New Zealand Warriors prop King Vuniyayawa.
In round 1 of the 2023 NRL season, Gilbert made his club debut for the Dolphins in their inaugural game in the national competition, defeating the Sydney Roosters 28-18 at Suncorp Stadium.
[19] During game 1 of the 2023 State of Origin series, Gilbert dislocated his shoulder which required a reconstruction ending his 2023 season.
On 26 February 2024, it was confirmed that Gilbert would be ruled out of the entire 2024 NRL season after suffering an ACL injury in a pre-season trial against the New Zealand Warriors.