Your trunk key should work on the glove box door. Did one of the two locks get chaged at some point? Because you can't remove the lock cylinder without using the key, according to the factory service manual. If the two don't match, you'll probably have to have the glove box lock rekeyed.
Hi Craig, thanks for the response. The round key does not work for the glove box but it works for the two doors and the trunk. I guess the lock must have been changed at some point. I understand that I need to have the glove box lock re-keyed. I need to know how to remove the lock in order to bring it in to a locksmith.