On Preview Markdown for G Suite's Privacy Page you can request and collect all the privacy and GDPR related information that Preview Markdown for G Suite is providing.
The privacy policy by is a legal document or statement that discloses how Preview Markdown for G Suite gathers, uses, discloses, and manges their customers' data.
The basis for Preview Markdown 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.
Subprocessors are companies that provide a service for Preview Markdown and who has or potentially will get access to personal data of their customers.