If she was innocent and had survived, would she have been in trouble for shooting them?
Practically speaking? probably. Legally, no. That's also explicit in Texas statute law. You can use force, under certain situations even deadly force to resist excessive force, even by an officer making an otherwise legitimate arrest, "if, before the actor offers any resistance, the peace officer (or person acting at his direction) uses or attempts to use greater force than necessary to make the arrest or search; " The next sections give the cases when deadly force is permitted, but they apply whether the offender is a police officer or not. Fearing for you own life is one of those justifications.
I don't believe she would, not in Georgia. Everyone has guns in Georgia and they are totally legal, as was hers.