Users Affected: self/family

Problem Description: I have given my old droid eris to my daughter to use.  She keeps getting gmail unable to log in error messages from my g-mail account. How do I remove gmail from the phone or remove the phone from gmails memory without resetting the phone?  It has data, and pictures on it she doesn't want to loose.  I have gmail set up on my new phone which has the original phone number.  The old phone now has a totally new phone number so I don't understand why it is still trying to reach the old phone.

Steps to Reproduce: Auto log in on phone, can't find settings to change it.