In the email spot type in your full Gmail or Google Account address. Leave the domain blank. Next type in your full email address, then password and then name the account. Click save and then the iPad will verify the account. A Server field will appear. In here type m.google.com. Once you click save you will know it is all correct if it will ask you which you would like to sync of the Contacts, Calendar, and Mail. Once you choose and click save at the top this is the final step.
Now if you change something on your iPad, when it is connected to Wi-Fi it will sync whatever has been changed. This is the best way to keep all your information in sync without having to use iTunes. This works if you change anything on on Google it will change it on your iPad.