Silent Member Registration During Gravity Forms Survey

Hi, I would like to do the following:

When User fills up a Gravity Form and presses the “submit” button, the following actions should be triggered:

1. automatically create Membership 2 Pro user (on the background) with the supplied data and send confirmation link (e-mail) to user.

2. at the same time login the new user AND (right after that)

3. automatically redirect to external page

I allready installed & setup “User registration” addon in Gravity Forms .

I found several threads about redirecting users after filling up registration form, but then membership levels are shown and I don’t wat to have any clicks of the user, it should all be done automatically.

Hope you can help me out here.