GDPR protocols apply to all forms of relationships where in concerns European Union Residents (full-time or temporary including foreign tourists).
The types of relationship fall under 3 categories:
✍ B2B (business to business) where third party relationships are involved in the processing of personal data.
✍ B2C (business to consumer) where you are required to demonstrate responsibility towards personal data.
✍ B2E (business to employee) where the data you hold on current, past and prospective employees is managed within the boundaries of GDPR protocols.