Gaggle only users
If you use the Gaggle interface (meaning you go to to check email), then you have nothing to worry about! The Technology Department will be migrating everyone's email over from Gaggle to Gmail. 

Just log in to your Google account, click the Apps launcher (9 square grid) in the top right corner, and choose Mail or just type in

If you forgot your Google password or need your account information, click here.

Outlook Users
If you use Outlook, then you will need to follow these directions: Using Gmail with Outlook 

Cell Phone Setup
The easiest option would be to download the Gmail app, but if you'd prefer to access it through the email option on your phone, follow these directions: Setting up Gmail on Devices