I went to a Gateway Country store and spoke to a woman in the service dept. She made all kinds of phone calls trying to track down the power adapter. She finally got a hold of some technician but he needed the serial number off my GCT.
I was patient and nice enough that she gave me the phone number of the technician so that I could call back with my serial number. When I called, they asked me which store I was calling from. At first they weren't going to help me because it was a "Store Only" help line. I quickly explained the situation and they asked for the employees name, store location, etc. and he agreed to help me.
I hope I didn't get this woman in any trouble. The technician said that next time I should speak to the Gateway Portables Customer Service at 1-800-846-2301. They also gave me some other help line specifically for the GCT 1-877-485-1465. The people at Gateway don't seem to know too much about this product.