probably get a small amount of pedialyte ( from the grocery store in the baby section)
boosting the electrolytes your gecko is taking in will help it to kick back, and allow it to make more out of the water and food it will be taking in from the CGD.
if your animal will for whatever reason not eat CGD, this is one of the very few times i would ever suggest trying to feed it some peach babyfood, as anything in it's stomache is better than nothing.
i would wait on the crickets until you know it is eating something else, if it won't eat anything else you can try crickets but do not leave them in the cage with the gecko as they may nibble on it.
finally, i would probably keep it in a fairly simple enclosure for a few days, in a relatively low traffic area of your house to help reduce stress.
let us know how it all pans out.