Once you've setup your GoCardless account, please make it uses the Pro account in order to leverage the full white-labeled experience, you need to do the following in PeopleVine.
In your Go Cardless account, click on the Developers tab.
Click the Create button then Access Token.
Enter PeopleVine under the name and click on Read-write access.
Copy the Access token.
Now login to the PeopleVine Control Panel and click on the settings menu and then click on Payment Processors.
Select to add a new processor and set GoCardless as the payment processor. Then enter the Access Token that was generated into the box.