Import Stripe Subscriptions?

Hi I have set up subscriptions through Gravity Forms and Stripe integration.

I’d like to migrate from that setup to membership or Pay Per View. This is a Productized Service, so there is no content on the site and no real membership functions that they’d need other than:

– the ability to update their CC information

– the ability to cancel their service

– the ability to change plans/apply discount codes etc.

– the ability to update their CC address etc.

Is there a way to do this with WPMU Dev plugins? I assume I can just create new users through the “Add New users” plugin, but how would memberships, or pay per view know there are already running subscriptions?

Thanks in advance!