What is is it okay for my gf to hit me?

No, it is not okay for anyone to hit their partner, regardless of gender. Physical or emotional abuse is never acceptable in any relationship and is a violation of basic human rights. It is important to seek help and support if you or someone you know is experiencing abuse in a relationship. There are resources available such as hotlines, counseling services, and legal aid that can assist in getting help and ending an abusive relationship.