Set Up Gmail as Exchange to Push Your Emails
Push email is always on, and being constantly transferred to your iPod on a continual basis. If you want Push emails, you can set up your Gmail account as an Exchange account.
Tap Settings from the Home screen, and then tap Mail, Contacts, Calendars.
Tap Add Account, and then tap Microsoft Exchange.
Enter your full Gmail email address, for example, XXXX@gmail.com into the field provided. Leave the Domain field blank.
Enter your Gmail email address again as the Username.
Enter your Gmail account password in the Password field, and tap Next.
Select to sync Mail. You can also sync calendars and contacts.
Next, your iPhone is going to ask you if you want to delete all existing data and replace it with Google data, or merge the two together. It will depend on how you store your data on how you answer this. If you have everything in Google Cloud, you will select Replace. If you have a mixture of mail, such as Outlook, you will want to select Merge.