Is Trevor in GTA 6?
The direct answer
Not confirmed. Trevor Philips has not been revealed for GTA 6.
As with the other GTA 5 leads, Rockstar has announced no return for Trevor. GTA 6’s story belongs to Jason and Lucia in the new state of Leonida.
Nothing rules out a distant cameo in the shared HD universe, but there is no confirmation, tease, or evidence that Trevor is in GTA 6.