Generally speaking, the personal possessions of Military members stationed overseas are allowed into the US without paying duty. From the US Customs and Border Protection website:
"The personal and household effects of any person (military or civilian) employed by the U.S. Government, and members of his/her family who have resided with him/her at their post or station and are returning to the U.S. with orders, may be entered free of duty unless items are restricted, prohibited, or limited as in the case of liquor and tobacco."
I wasn't sure if a vehicle counted as "personal and household effects", so I dug a little deeper and found this, also from US Customs and Border Protection:
"(for) Military Employees of the United States... In the case of a vehicle, the claimant must have taken possession of and registered the vehicle while overseas. If proof of registration is not provided, the vehicle is not entitled to free entry pursuant to 9805.00.50 and the appropriate duties must be assessed and paid."
So, it
does matter if you've owned and registered the vehicle in your name while overseas. If you have, no import duty. If you haven't, then you have to pay.
As regards getting the car through US Customs when it arrives, you'll likely still need the NHTSA HS-7, EPA 3520-1, and CBP will still issue a 7501 (or equivalent) for you, as spelled out earlier in this thread. I've never brought a vehicle in through the military, but according to the The Atlanta VPC website, you just need to make an appointment before you go pick up your car, and you
can send a representative instead of going yourself:
"Before you travel to the Atlanta VPC please check with your Installation Transportation Office and your Chain of Command.
Service Members who have been notified that their POV has arrived and is ready for PICK UP may PICK UP their POV during normal
operating hours with an appointment Please refer to the Pick Up link on the home page."
"Only the service member-owner or their representative may enter the VPC building. All others accompanying them must remain outside in their vehicles."
Details can be found here:
Number one resource for U.S. Service Members moving or storing their personally owned vehicles for a permanent change of station.
www.pcsmypov.com
Probably a good idea to reach out to staff at the VPC with questions prior to shipment.
I'm not in Georgia, so I can't help you regarding registering an import there, but I see that
@Gun Runner 5 has PM'd you, so I'd assume he can help with that.