If you push the top of the tub all the way to the left you will see a little window on the right side of the tub top. Assume one would have to remove the front to access the light socket for bulb replacement
One thing that commonly goes wrong with the old Maytag gas dryers is the pilot switch. They are NLA so it would be difficult to find one if it is bad on this one.
I would think twice before buying the dryer at that price without testing the burner.