Q: Key stuck in 2009 Pontiac g6

This could be a carry-over issue from earlier models. There was a service bulletin issued by Pontiac in 2005 for a shifter cable issue causing your problem. The shifter interlock can be out of adjustment or just worn. The shifter may not be moving completely into park, keeping the ignition lock cylinder from turning completely to the off position. It could also be the ignition lick cylinder and/or key. They wear with age which can cause difficulty turning the ignition. Try pushing on the shifter towards park with a little force while trying to turn the ignition to the off position. Also, try wiggling the steering wheel and turning the key. Even if one of these steps work, you should have a certified technician inspect the ignition lock to find the exact cause.