All the current Outlook versions (2003/2007/2010/2013) can be configured to access Gmail. IMAP is the recommended email protocol to enable Gmail connectivity from Outlook.
In order to setup Outlook for Gmail, you need to enable IMAP feature in Gmail settings. IMAP can be enabled in Gmail settings, under Forwarding POP/IMAP
How to setup Gmail in Outlook
In order to connect Gmail from Outlook, click on File –> Account settings and Add or remove accounts. In the next screen, click New, select Email account and click next. In the next screen, select manually configure server settings and click next. Select Internet email. Type in your name and email address and select IMAP in account type. Fill in imap.gmail.com in incoming server field and smtp.gmail.com in outgoing server field. Now fill in your full Gmail address in the user name field and enter your password. Now click on More settings and then advanced. Enter 993 in incoming server field and 465 or 587 in outgoing server field. Select SSL from the drop down list for both incoming and outgoing servers. Now select Outgoing server Tab. Enable the check box: ‘My outgoing server requires authentication’ and use the same settings as incoming mail server. Click OK and then Next. Close this settings screen. Now you can access your Gmail in Outlook.
For more details, please check the Video on How to Setup Gmail in Outlook