I have asked this question before. Others have said on here they have not been charged. But, like someone said, they bury this stuff on leases.
I went line by line and verified what they were charging me. This was after my agreed upon monthly fee was different than what the finance manager was coming up with. And yes one of the differences was that they did add this administrative fee to my lease. Plus, had to pay tax on my GM card rebate. I complained up and down but to quote the dealer - "GMAC will NOT let me waive this fee." So, I made them make it up on my trade as I refused to sign the paperwork.
My complaint to the dealership was that during all of the negotiation this was not once brought up. Granted they have to make some money to process the paperwork. You figure over a 3 year lease, this was almost $20 per month as I put nothing down.
I am going to personally call GMAC. Unfortunately, just haven't done it. If someone beats me to the punch, please let me know. If this was a dealer imposed fee, I will be sure to let my salesman know about it.