Are there any canonical connections between grand theft auto games?

All known public information indicates that the Grand Theft Auto series is a separate, self-contained narrative universe developed by Rockstar Games. While Rockstar has produced other titles such as Red Dead Redemption, no verified evidence links the storylines, characters, or settings of Grand Theft Auto games to each other or to any other Rockstar titles. Consequently, each GTA game is considered canon within its own continuity, and there are no established cross‑over events or shared plot elements among them.