How early should I get to the Gexa Energy Pavillion in Dallas to get good seats?

If you have the patience, I'd get there at least an hour before the doors open just to be safe.

This is a sold out concert and as a lover of standing and lawn seating I always show up earlier just in case and if its TOO early find something to do in the area like grab a bite to eat somewhere close.

That's instead unusual for the reason that i've been to the American airways core and there is no lawn. Might be that's quite simply what they call the far away seats. There are big shows and stuff so you'll in finding what's going on although, i would say go its fun