Frank Gore has been charged with simple assault in connection to a domestic violence investigation.
There was a dispute at the casino on July 31 A woman is talking with hotel security.
Gore was charged after the woman didn't file a formal complaint.
Gore will be in court in October.
In June, the 39-year-old retired from the National Football League. He retired as a member of the 49ers after signing a one-day contract.
Gore spent his first 10 seasons with the Niners and is the franchise's all-time leader in rushing. The five-time Pro Bowler ran for the third-most yards in the history of the National Football League.
Gore was a player for the New York Jets. He lost a split decision to a former NBA star in an exhibition before winning his professional debut in May.