Do grand theft auto games share any recurring characters?

The single source supplied is an article about Red Dead Redemption: Undead Nightmare, a standalone expansion to the Western game Red Dead Redemption. It details a zombie‑plague storyline featuring protagonist John Marston, but it contains no mention of the Grand Theft Auto series or any characters that appear in both franchises. Because the evidence does not reference GTA titles or any crossover characters, we cannot confirm that Grand Theft Auto games share recurring characters based on this information alone. Further research using sources that discuss the GTA series would be required to determine whether any characters appear across multiple games in that franchise.