On Shared Contacts for Gmail's Privacy Page you can request and collect all the privacy and GDPR related information that Shared Contacts for Gmail is providing.
The privacy policy by is a legal document or statement that discloses how Shared Contacts for Gmail gathers, uses, discloses, and manges their customers' data.
The basis for Gapps Experts sharing, adding, uploading, hosting, accessing or sending personal data out of Europe. Vendors can also add a description of their own impact assessment for data transfers.