Don't know too much about gold dust geckos but I know that my female standings stops eating around the time she's going to lay. If your gecko only laid one egg, she may have another waiting to go. Also, is she in a shedding cycle? I also know that all my geckos will fast for a few days before their shed.

Have you offered her fruit baby food? Try some peaches and see if she eats. If she's still very active I wouldn't worry too much. She may be eating when you're not looking.

You also might want to take her to a good herp vet to check her out. If she really is wild caught, she might have some parasites that are taking from her appetite.

Good luck.
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Lisa

1.0.0 P.m. grandis (Linus)
4.3.0 P. standingi (Toby & Kona and their 5 babies)