Yes, I had this happen to a leo a long time ago, and the vet gave her mineral oil, and it fixed her. I was keeping Jewel on Calci-Sand at the time (didn't know any better), which showed up as a solid white blob on the x-ray. No question in her case what the problem was. The vet gave her mineral oil via a stomach tube once a day for 3 days. Lil Jewel started passing crunchy poop and after a few days started eating again. She recovered completely. (and I tossed out about $30 worth of calci-sand).
What would your gecko be impacted with? I mean, what substrate would she have eaten?
What you can do for her: Get her off whatever substrate may have impacted her. Make sure she has water to drink to keep her hydrated, this will help her pass the stuff. Watch for the stuff in her poop. If she starts passing it, that is a good sign, and you and the vet need to know if she's passing it, or not.