My williamsi are ravenous chow-hounds. They refused Repashy CGD when I first offered it, but on a tip from Switzer, I offered them peach baby food--this, they loved. So I mixed some with the CGD, and they went insane over it. Now they're eating plain CGD and dusted insects.
I'm not sure if these lizards can be maintained exclusively on CGD. I want to say I have some reservations--in the wild, they must be primarily insectivores that occasionally eat flower nectar/pollen. It's hard to fathom that they would have the opportunity or ability to eat fruit very often, if at all. They appear very healthy with CGD as part of their diet. I'm going to do some feeding trials with them, when I have the opportunity, and I will let everyone know how that goes.
At the moment, I would recommend continuing to feed dusted insects as a major part of their diet. They will eat until they look like they are going to explode, though, so you will need to control the frequency of feeding, and possibly the quantity, once they're over importation stresses and are up to a normal weight. I think these lizards would very QUICKLY become obese if offered food continually, no matter what food it is.
I do feel that Lygodactylus do better with sugar in their diet. The reaction I got when I gave them the CGD/peach mix was phenomenal--their colors exploded, they were diving around the tank, courting, and having a great old time. They did calm a bit once they got used to it, but their activity level is still notably higher than it was on insects alone, particularly their breeding behaviors. I will also note that they liked the CGD/peaches better than they liked the peaches alone, and they now appear to love the plain CGD as well.
As for your old bottles of food, take care that they haven't expired! These powdered diets have a shelf life of 6 months to a year (depending on brand), then the vitamins will start to degrade and they will no longer be sufficiently nutritious. If they have been kept refrigerated, they will last longer.