Here are the several steps which you can follow to configure Gmail in outlook. But Before you configure your Gmail account in Outlook, you will need to enable IMAP?POP settings in Gmail. After that you can set up your Gmail in outlook account.
1. Launch Outlook in your system
2. Click on the "File" menu and then click "Add Account".
3. In the windows that opens, click "New"
4. Type your Gmail address and click on "Connect".
5. Type your password, then click "Connect"
6. After that Outlook will add your Gmail.
7. Click "Done". That's it, your Gmail has been successfully added in Outlook.