MSRRA- Georgia with FL HOR

I am active duty with FL as my home of record. My girlfriend at the time, also a FL resident, moved with me to GA on PCS orders in May 2018. Her 2018 GA state return was filed as a non-resident since she still maintained everything from FL.  After we got married back in FL in Sept 2019 she got a GA license when she changed her name.  I didn't know MSRRA was an option so she never filed a G-4 with her employer to stop GA withholdings. Now for 2019 returns we are filing jointly. 

Can my wife still claim FL?

Do we still file GA and claim non-resident?

Or does she just file her own GA state return?