This plugin will create, edit or delete events from your Google Calendar each time a booking or black booking is made, amended or canceled on your Jomres powered site. You can add events to a different calendar for each property , or to a default one (all properties events to a single calendar), and you can choose which details to include in the event title and details.
Plugin installation can be made only by using the Jomres 3rd party plugin installer. After successfully installing the plugin, new buttons will be created in your Jomres control panel (backend and frontend). All plugin settings can be made from here. Please refer to the Google Calendar Integrator Plugin Manual for full details about installation and configuration of the plugin.
Google Calendar Integrator Plugin overrides j02136saveblackbooking.class.php and j02138deleteblackbooking.class.php, so please make sure you don`t have any other customizations that override these files, otherwise the plugin might not work as expected.
This plugin requires Jomres v5.6 or above.
Price: €29.95 
Changelog
Google Calendar Integrator Plugin v1.3
Updated for Jomres v5.6.
Google Calendar Integrator Plugin v1.2
Small fixes and improvements. Dropped compatibility with Jomres versions older than 4.7.
Google Calendar Integrator Plugin v1.1
Fixed event details template issues for regular bookings.
Google Calendar Integrator Plugin v1.0
Initial release