Click the event icon on the event topic and select Delete from Google Calendar to delete the event from the Calendar. Note: deleting the event topic from the map (using the Delete button or via the topic context menu) will not delete the event from the Google Calendar!
You can also disconnect the event topic from Google Calendar. Click the icon on the left of the event topic and select the Disconnect from Google Calendar command from the context menu to turn the event into a regular map topic that will no longer synchronize with Google Calendar.
To disconnect all events from a particular Google calendar, select the calendar topic (topic with calendar name), choose the Disconnect from Google Calendar command from the context menu. This action will convert all events on this calendar branch into regular map topics that will no longer synchronize with Google Calendar.
To disconnect all events from the Query branch, select the Query topic, choose the Disconnect from Google Calendar command from the context menu. This action will convert all events on this Query branch into regular map topics that will no longer synchronize with Google Calendar.