anonymize data

While the Salesforce platform is GDPR compliant, the factors/features contributing to your organization's data, processes and use of the system could be complex, and a specific feature will not probably address everything.

Here's a great article that outlines some of the ins-and-outs of Salesforce and something new called the "Individual" object and some of the strategies around meeting those requirements. This may help point you in the right direction (I.E., not just features, but features and process):