GDPR in Raynet is handled by adding a new tab (on the Account card - for individuals, Contacts and Leads) where you can store all the legal titles that allow you to manage and store data about your customers.
You can turn on the GDPR module via your name in the top right corner of the screen » Settings » Add-ons » A toolkit to help you meet your GDPR obligations. This can only be done by an administrator who has access to this button.
Find a lot more information on how to work with the GDPR module in this blog article. It's definitely worth reading.