Hello keithw16, Welcome to the Sage ACT! Community. The Gmail integration works differently from the Outlook integration. It requires a sync to run (not automatic when emails are sent/received), and it will search the Inbox (received messages) for messages to record to history in ACT!.
Note: Effective 6/1/13, Sage no longers provides support for the Act! software. This is now provided by Swiftpage.