As Marsha said above...
The butterworms should be fine for your Bearded Dragons and the gargoyle (if it is adult?). Not sure of the common name for the gecko vittatus? so can't advise at present.
We try to feed all the lizards as varied a diet as possible, though this often proves more tricky than thought!

As a staple we stick with crickets, since we can buy in bulk for a reasonable price. Mealworms are a regular feed as well - the chameleon is a bit fussy and has become quite lazy about hunting his crickets!!
We also feed locusts - as often as we can: they are more expensive but they are full of good stuff and all the lizards go absolutely mad for them!! We've tried cockroaches for the larger lizards - Bearded Dragons, adult collards.. and they were liked, but not so much by us!

Again, they are more expensive for not very many, so they are another treat. Wax worms are a firm fave in the treat department. We have been unsuccessful with earth worms - I think most of the lizards are put off by the fact that they are slippery and not easy to pick up, but I can't get any of them to take them.
Veg and fruit for the Bearded Dragons of course, and I presume you also feed your gargoyle baby food or mashed fruit?