You will first need to create an Email in Genesys Cloud and route that into a queue using the Email settings under Contact Center.
Then, create a user and assign that use the Email address from above and assign the DID for the fax. Set the status of user to DND or Away. Make sure the user has fax and voicemail permissions.
Now, when you fax to the user, you should be directed to voicemail, it will hear the fax tones and receive the fax. That will be sent to the Email and queue for agents to receive and deal with.
One caveat: You can't have HIPAA enabled on our ORG.