US Gun Laws, in general

[sumpnz]

require a license for concealed carry but do not require a license for open carry. I believe that also applies to Arizona.

That is correct. AZ also allows permitless concealed carry in a vehicle so long as the pistol is holstered (it can be under the seat, between the seats, velcroed under the dash, so long as it's in a holster). They also define open carry as having at least some recognizable portion of the gun visible, say a few inches of the grip.

 

[TooTaxed]

Georgia allows open carry, but concealed carry merely requires registering with the local Chief of Police to get a license. No training class is required.