Yes, Zapier is GDPR compliant, you can find the details in this help doc.
Learn more about how Zapier handle safety and privacy:
Is Zapier safe for businesses to use?
These are particularly important, considering that they'll be handling your sensitive company data. This article will address some of the frequently asked questions and provide answers from the people that know best - Zapier themselves. The security of your account and the data you upload is a big priority for Zapier.