I was born in Kansas and raised in Oklahoma ( Tulsa and Miami) but I've also visited OKC a few times. Let's just say that I left when I was 17 and never looked back. It is not a gay-friendly area at all. Coming from California, a blue, liberal state, to OKC, an extremely religious, red state, is going to be a shock and a half.
Are you moving there due to work or family reasons? If not, then you should really consider moving somewhere else. The people are genuinely friendly but only to people just like them. If you're a white, Christian family man, then you'll fit in nicely and will be adored by the community. If you're anything but, then you'll have a hard time fitting in.
Oh, say hello to Sally Kern for me!