Live crickets would be something you might want to try.
They are a better protein source than Meal worms and the gliders will enjoy the hunt. (as long as they are not afraid of them).
My gliders freaked out(they were young and I have not tried it again with them- and crickets freak me out)
.
I ordered them the canned crickets cooked in their own juices(yummy.. huh?)they were freaked out by those too.
They Love their mealies but I only give them occasionally. Their diet has plenty of protein so the mealies are just a snack.