Okay, I got word from management to clear this up:
"The Golden Circle IS the Reflection Section, and purchasing those tickets do guarantee access to the Reflection Section. We have a few local promoters here who call these special areas Golden Circle regardless, but are working on having them change the terminology to be extra clear.
GA tickets do get you up to the barrier. The only exception is where the floor is separated into two GA sections, in which case the more expensive GA ticket will get you access to the part of the floor where you could potentially get all the way up to the point of the stage.
We are continuing to advise each ticketing site to put up seating maps so that it's even more clear."