There are 2 columns to track if candidates have complied to GDPR.
Consent to Keep
You can find this in the Candidate's list like this below:
Consent to keep will only change if you enabled the setting below in Engagement hub. This will require the candidate/applicant to register or create an account before applying for a position.
Consent to Keep status:
Unknown - The Welcome to Engagement Hub has not been sent yet
Pending - The Welcome to Engagement Hub has been sent and waiting for the candidate to register and login to the portal
Consent Given - The candidate has registered to the portal
And when a candidate registers, and selects this tick box, it will change the status to Consent to Given
2. Consent Status
You can find this in the Shortlisted stage like this below. If the status has been updated it means the candidate has given consent to the job they are assigned to.
You can also find the 2 columns by just heading to the Shortlisted stage.