Google Apps Email is Googles webmail service. It offers personalised email addresses and a client tool for managing email that includes integrated contact lists and calendar features.
You can find a basic introduction to the Google Email service here.
This page also includes a link to some basic FAQ's that have been asked by Dublin GAA mail users. This can be built up over time to include some quick helpful solutions for common problems identified by GAA email users.
The attachments page below includes one of the early manuals produced as a quick guide to the new mail system. Some screen shots and features included may be out of date.