How to Set Up Email Rules on MS Outlook (when your Gmail has been added as an account)
This article will assist you with: setting up Email Rules on your MS Outlook Desktop App after you have added Gmail as an IMAP account on the MS Outlook Desktop App - please see this article for setting up Gmail on MS Outlook
1. In the MS Outlook Desktop App, head to Tools and then select Rules

2. Select IMAP on the left and then click the + button to add a new rule

You will be able to add new Email Rules using the IMAP Client Rules