On gdpr-info.eu you can find the Regulation (EU) 2016/679 (General Data Protection Regulation) as a neatly arranged website. All Articles of the GDPR are linked with suitable recitals. The European Data Protection Regulation is applicable as of May 25th, 2018 in all member states to harmonize data privacy laws across Europe.
The the official PDF of the Regulation (EU) 2016/679 (General Data Protection Regulation) is available here
Visit our german site for more specific guidelines.