what is the difference between GA0 and GA1, 2 , 3 OR 4?

General Admission is lawn seating no chair. They have to sell you a ticket with some type of number.

Nothing. Lawn is Lawn 😀

Its all general admission. You can sit anywhere on the lawn.

Nothing

Nothing...GA 0-4 is all one big great lawn

Just the difference in line when you bought the tickets. It's general admission in all cases, so get there early if you want the best of GA.