Full timer driver licence

Which one are you going to use as your legal official address....GS Mail Service Address or your rented out home address?

That is the address you list on ALL documents/licenses etc.

I will use GS mail service

You just asked the same question twice in 2 different threads......anyway, from my experience it really doesn't matter what state your license is in, especially if you're ft on the road.
Only ones who might care are cops when you get pulled over. And at that, I've lived in over a half dozen states in the last 20 years and I change my license when it expires.
Cops may question it, but I've never really been hassled about the state, except when getting resident fishing or hunting licenses.

Your driver's license should match your mailing address.

Which state is your GS mail service in ? Is that state your domicile state ?

I would have my mail address, driver's license, vehicle registration, voter registration, address used for banking, IRS, etc., EVERYTHING in the same state.

You want to simplify things, not make them more complicated.