Yes GA is illegal, don't even bother asking for a permit - there is none. In an emergency you can at least drive to Florida where they are 100% legal to keep and great vets abound. There is a vet on Wilmington Island that may treat.
Avoid "Bill's Nut Squares" like the plague. HHB's are the best. If he will not eat rodent blocks there are Boo Ball recipes on here that use rodent block as a base
Here is the diet I use
Teklad 2016 Blocks as a base diet (always available):
http://weecompanions.org/healthy-food
Mazuri Rodent Blocks are good too.
2 of these per day as a supplement (keep refrigerated or freeze):
https://www.henryspets.com/squirrel-...adult-formula/
Follow this diet plan to the letter:
https://www.henryspets.com/healthy-d...pet-squirrels/
Hazlenuts and Pecans in the shell for incisor wear several time a week (do not overfeed)
All fruits and veggies should be washed