Having your users go to the Address Book to view the GAL is kind of a clunky way to go about it, IMHO.
What I like to do, is in a Users "Options" area, Address Tab, is select the "Search Gal...." option.
This way, when a user starts a new mail message, they need only to start typing the first name of the internal contact they want to message and it will automatically be populated by the GAL.
Much more efficient than searching, finding, manually selecting your recipients.
"Let's look at this from a standpoint of "Status". What exactly, on the Space Craft, IS working?"
-Flight Control, Apollo 13