ok, in GA, he has established residency because of the bills in his name. ** you will have to change them all over to your name prior to him moving out.
Also this means you have to give him proper notice, which is considered 30 days if there is no formal rental agreement.
Now I will also tell you that the Atlanta City police will not do anything about this either way and merely tell the other partner to sue in civil court.
In fact I doubt that a City police officer would even be dispatched for this. ** In the City of Atlanta if you have your car broken into, they don't even come for that, merley give you a number to file a report the next day.
When off duty once I caught a person breaking into a home and had to wait 45 min for them to send a officer to the scene.
but legally they have to be given notice