I have a Kirkland Signature Whirlpool Dryer that will not heat, everything else works fine. It is a gas dryer. Is it a pilot light or something?

Only very very old dryers have pilot lights. You probably have a bad ignitor/glow bar or a bad limit switch. Look at your owners manual or check the "stickies" at the beginning of the Appliance posts-"Gas dryer trouble shooting".