This dryer has worked perfectly until just now. I went to get the laundry out and everything was wet. I tested it and there is no heat.

I want to know if there are a few basic things I can check before calling the appliance guy. I have already confirmed that there is gas getting to the dryer but that's about it. I don't hear any clicking or zapping or anything that sounds like it is trying to ignite.

Commonly it has to do with the burner system, for instance a bad ignitor, thermo-fuse, flame sensor, burner coil set, and sometimes thermostats, all of which may be checked with an ohm-meter after unplugging the AC to the dryer.
If you are fairly handy, you can figure it out.
Good luck!