Hi, You posted your washer model number by mistake.
I believe this is your dryer: GLGR341AS4 from this thread:
My dryer is currently melting certain synthetic fabrics (my wife's leggings). She believes it started not long after I replaced the blower wheel a few months ago. I can't say whether it happens only with heavy loads, but I know the most recent time it happened, it was a heavy load. The drum...
From your 1st photo above it looks like your rear bearing has worn out, and that could cause the belt to break to quick.
Here's the rear bearing for your model(Video Included):
Also check your idler pulley to make sure the roller is spinning free both ways.
Here's the idler pulley for your model:
Idler Assembly 131863007
Whenever you replace the bearing, its always best to replace the front glide felt pad kit as well.
Here's the front glide felt pad kit for your model you can order:
Felt Seal 5303937182