At first glance, there is a conflict between the GDPR and the new whistleblower policy. While Article 15 GDPR gives the accused the right to obtain information about data concerning him, Article 16 of the directive states that the identity of the whistleblower may not be disclosed.
However, the conflict could be resolved by recital 84 of the new directive: According to this, the unrestricted effectiveness of the directive is to be established by restricting certain data protection rights through further legislative measures.