On Salesforce.org Nonprofit Cloud's Privacy Page you can request and collect all the privacy and GDPR related information that Salesforce.org Nonprofit Cloud is providing.
The privacy policy by is a legal document or statement that discloses how Salesforce.org Nonprofit Cloud gathers, uses, discloses, and manges their customers' data.
The basis for Salesforce.org 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.