I have a Frigidaire GLER341A Electric Dryer and inside the dryer in the drum, It is full of lint. How can I get the lint out? Thanks:)

Clean out the exhaust vent pipes. You'll probably have to open the dryer case, remove the drum, and clean everything out. After reassembling, it should work properly.

How do I remove the drum?

It depends on the make and model. On my drier, the front comes off. There are two bolts that fasten the front to the top and two clips that pull out at the bottom. The drum rides on the front so once the front is off, the thing sort of falls apart.

Here is where you can manuals for your model (there appears to be 3 sub-models). You'll want to look at the "parts manual" to see how it comes apart.

http://www.frigidaire.com/support/ResultsPage.asp?strModel=GLER341A&User=&Search=Search