Gavet's release comes after disciplinary issues contributed to him being dropped from the Warriors side for their final round 20-16 win over Canberra on August 25.
It's understood Gavet was late to training and a couple of other club functions in the lead-up to retiring forward Simon Mannering's 300th NRL game and last home appearance at Mt Smart Stadium.
Gavet returned to the starting side for the Warriors' season-ending qualifying final loss to Penrith at ANZ Stadium in week one of the playoffs.