The Spanish speaking actor Jorge Consejo who listed GTA 6 in his CV responded to the questions from the fans regarding GTA 6.
This tweet is from the last year. He answered that he can neither confirm nor deny this.
After people kept asking him about GTA 6 he posted a new tweet again several days ago.
Dear friends, while I read every message from you, please know that because of contract stipulations sometimes I'm unable to comment on certain projects. Please don't feel ignored or unseen. I appreciate and value every single of you.
Of course, this is not a confirmation. But it's not a denial either. However, why would Jorge explicitly put GTA 6 in his CV if there are contract stipulations?