i use the SyncInABlink App…but

you may find another App (which is free) useful. You may also want to export your contacts in Gmail first.

If you don’t have a Exchange Account already running you can use the Google Active Sync settings: (you may want to backup your data in advance)

1. Settings App
2. Open Mail, Contacts, Calendars.
3. Tap Add Account
4. Use Microsoft Exchange.
5. Email: anything you’d like
6. Domain: blank.
7. Username: Google Account email address
8. Password: your password
9. Tap Next
10. Server field appears: enter m.google.com.
11. Press Next. Then prepare for sync.