Being GDPR compliant may require obfuscation or removal of some data before it gets loaded into a data warehouse. This can be achieved with an EtLT (Extract, “tweak”, Load, Transform) approach to data integration – in which a very light “tweak” (small “t”) transformation is done on the data before it reaches the destination. This is discussed in detail in the following article:
https://airbyte.com/blog/etlt-gdpr-compliance