Well if they have never married it is going to be a little harder for him. If there is know custody order though the courts then he can file for custody just as his ex girl friend can. At that time the court will decide wheather to give both parents joint custody with either the father or the mother having physical custody. n the custody order you can have it stimpulated that neither party can move the child out of state. Visitations will also be stimpulated as well as child support if there is know child support already ordered. Hope this helps good luck


