You can add a Gmail account to Microsoft Outlook, to view and manage your email, calendar, and contacts, all in one place.
To add a Gmail account:
In the Outlook menu, select Settings.
Select Accounts, then the plus (+) button and Add an account.
Type your email address then Continue and follow the prompts.

Follow the prompts to complete the process. On the Google account permissions window, select Allow.
Once your Gmail account is successfully added to Outlook, select Done, or add another email account.
To set the Gmail account as primary:
In the Outlook menu, select Settings.
Select Accounts, then the Gmail account you would like make the primary account.
Select the Rearrange accounts (...) button, then Set as Default.