Rockstar’s security is usually very tight, but since they only really make two franchises these days it’s not that hard to guess some details about them, and many open world games do allow you to play as either female or male, or in Cyberpunk 2077, a non-gendered character.
Grand Theft Auto VI rumours have been flying about since, well, before Grand Theft Auto V, and there have been all sorts of outlandish claims.