It seems to be perfectly legal in Georgia to shoot a home intruder.
The law has three stipulations, one of which must fit:
The intrusion is “violent and tumultuous” and the resident believes its purpose is “assaulting or offering personal violence” to someone inside.
The intruder is “not a member of the family or household,” meaning you can shoot strangers who break in, but not someone who lives with you and just lost the door key.
The resident believes the intruder broke in to commit a felony and deadly force is required to stop it.
He was not in a home. He was not intruding. This does not apply. But even so, I don't believe one of those conditions would apply.