Sorry to hear about your little guy! I just use the reptile carpet with our gecko - it's easy to clean and looks nice.
I would recommend the pedialyte over the gatorade, too. I'm not sure if it would apply for gecko's - but if she's not eating I've used the AdCham Bug Juice recipe for rescued chams and it works like a darn!
A warm bath doesn't hurt either!
Best of Luck!