what is the temp of the cage at the moment? you might want to soak the gecko with a little bit of water. Also you might want to try offering a little bit of pear baby food just to see if that won't stimulate feeding.

Hope that helps
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collection list:
0.0.2 sulcata torts (3 inches and 4 inches)
1.0.0 Bearded Dragon
0.0.1 Red Blood Python
1.2.0 crested geckos
0.2.1 gargoyle geckos
0.1.0 mini-dashound (the wife thinks this one is funny)