Yeah, unfortunately that looks a lot like the gargoyle a friend cared for with MBD (a herp rescue). I would highly suggest a vet trip, since she looks like she's got enough weight on her they could give her an injection of absorbable calcium to help jump start the process. It wouldn't hurt to just get her checked out anyways just in case there is something else too.
Is she able to eat ok? Really, CGD is fine in the meantime, no need to order that should be at any chain store. Or babyfood with leopard gecko cricket dust mixed in is good too. Everyday the little one is like this greatly reduces its life expectancy, you really need to be pushing some calcium. I'm sorry, it looks like it is far enough along that she'll probably not recover full jaw function (you can see her legs are off too). Good luck.
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0.1 Albino Leo Gecko
0.1 Crested Gecko
1.0 Dear Boyfriend
Departed: Harvey and Spock