GDPR - Automatically deleting old tickets via the automation feature

We're in the middle of our work to comply with the new GDPR (General Data Protection Regulation) policy which will "go live" on may 25:th (2018) in the EU. GDPR states that no company may save the personal information of their customer longer than needed, how long this period of time is may vary depending on why the information is kept but can as far as I know not be indefinite.

Personal information can e.g be an email address or an email signature with a phonenumber or an address to the person sending the email and since we never know what information is in each ticket without manually going thru every ticket we'll have to delete them.

As of now there is, as far as I know, no simple solution to do this in Zendesk without using the API or "hacking" your way around it using the method described here -> https://support.zendesk.com/hc/en-us/community/posts/203723688-Auto-Delete-a-Ticket-with-a-Trigger

What we need is a way to create a simple automation where you can say "tickets with status *insert status here* should be deleted after *insert number of months/years* year(s)".

This would give everyone an easy way to follow GDPR fairly easy imo.