I've stayed at neither one . Looking at prices for GP. They were almost double the price. I'm sure it's nice though. Not sure where you found it cheaper.
I have little experience, but have found orbitz to have the cheaper prices, and GP less than Temptation on that site, or very close in price.
We looked at going to GP a while ago. It was double of GOV then. As proven by GOV. If GP is that nice and same price as temptations they should be busy and more talked about. I hope the price does stay low. Competition is a good thing.
We have been to TTR and GP many times. The GP is much nicer but this year their prices are high. They have as many repeaters as TTR. The gp food is better. The vibe at TTR is tops. To each their own. Ours is gov this year.