No, Trevor is not in GTA 6 as of September 1, 2026. Rockstar has not confirmed any returning characters, and Trevor Philips is not mentioned in any official material for the game. His story arc ended in Grand Theft Auto V, and the studio has shown no sign of bringing him back.
The game arrives on November 19, 2026, for PS5 and Xbox Series X|S. The single-player campaign introduces a new pair of protagonists, Lucia and an unnamed male lead, set in Leonida. Rockstar’s two trailers and the 26-minute extended look from August 27, 2026 feature none of the GTA V cast.
What you can expect instead is a standalone story with fresh characters and locations. Some fan theories suggest cameos or radio references, but those are pure speculation. If Rockstar plans any legacy characters, they have not said a word. Treat any claim that Trevor appears as a rumour until an official announcement lands.
For now, the safe answer is no. No Trevor in GTA 6, no other returning protagonists confirmed, and no hint that will change before launch.