It didn't look like she had the foot completely under the chin. I have defended gogo's successfully by turning my head and tucking my chin so the shin doesn't get on the throat (not that technical, I know). It crushes the jaw and hurts like a bitch, but you can survive like Kaitlin did until the bell rings or until your opponent gets tired and goes for something else.
If she had the foot under the throat, she would have tapped pretty quickly.
I was more impressed with her RNC attempt though. Given 10 more seconds, Kaitlin would have had to tap or go out.
Overall, it looks like Gina's ground game is coming along decently, but I think she needs to work on her wrestling and clinch game a little bit. A few times they clinched and Gina looked like she didn't know what to do, and nearly gave up her back (or at least a good wrestler would have taken her back).