My gas dryer doesnt receive hot? ...
Check on the timer as said above, check your lint catcher, and check your gas hose going to the dryer.
I've never used a gas dryer before.
I have an electric dryer, but when it doesn't attain hot, my husband usually fixes it, he usually says the heat element is the problem, it get a break in it, and he repairs the break and it go back to working.
It might also be a problem beside the timer, possibly someone else used it and changed your settings
Answers: Check the pilot light, it's unusual but I own had mine turn out. if that't not it, then I would bid the repair guy!