The Order Delivery Date Pro for WooCommerce plugin is now made GDPR Compliant from 8.4 version:
(a) On Google Calendar Sync Settings page, a notice is being added which informs the admin to mention about the Custom Data which will be exported to the Google calendar in their Privacy Policies.
(b) CSS files for the calendar themes are now been included in the plugin itself, instead of using them from an external source.
(c) Export Delivery information captured by the plugin
From WordPress v4.9.6, the ability for the site users to export and erase personal data from the site for a given email address is included. From our Order Delivery Date, Pro for WooCommerce plugin, the Delivery Date for the orders will now be exported to the User’s Personal Data from the Tools -> Export Personal Data menu.
The Order Delivery Date for WooCommerce (Lite) is made GDPR compliant from version 3.5.
Except the Google Calendar sync, everything else is same for Lite version as mentioned above for Pro version.