GA Shows at merriweather are always different.
some, you buy Pit tickets, Seats, or lawn and you can go anywhere you want in those areas (no assigned seats)
however, for fall out boy last year, it was ALL GA and the first 500 people or whatever got Pit wristbands, the next few thousand got Pavilion and the rest had to sit in the lawn.
this seemed to be unannounced however, and it really made teens hearts beat faster, faster.
but they DO have to restrict how many people are in the Pit and Pavilion.
if all the tickets are the same price...i would plan on showing up way early to get a good wristband.