He signed with the New Zealand Warriors in 2010, turning down offers from the Manly Warringah Sea Eagles and the Wests Tigers.

[7] Gubb earned a full-time contract with the club and spent the first half of the year playing NSW Cup with the Auckland Vulcans.

His contract was extended until the end of 2014 in June and, after several games as 18th man, Gubb was named to make his first grade debut for the Warriors on 7 July 2013 after Russell Packer withdrew due to injury.

[8][9] In 2018, Gubb joined the Canberra Raiders but halfway through the season signed with English club Leigh Centurions.

On 4 March 2019, Gubb announced his retirement from Rugby League at the age of 28 to pursue a career as a teacher back in his home country of New Zealand.