Hi there,

Thanks for taking an interest!
Stronger is compatible with Timetable Responsive Schedule for WordPress Plugin, unfortunately we haven’t tested Google Calendar integration, however as we have read on the plugin authors page there is a possibility to integrate it with Google Cal, where you can export and import calendars, please check this screenshot. Best practice would be to contact the plugin author about the integration however please note that we have not tested this integration with our theme nor can we guaranty compatibility. The official plugins we provided bundled inside our theme are the ones that are tested several times before the theme was launched and we guarantee their functionality.

Thanks for understanding.
Best,
Qode