Appointment+ Google Calendar

I am trying to get Apointments_ working

I've been able to setup the API and test the connection successfully. The test appt does show up in my google calendar

I can get the events that I have in the google calendar to show as unavailable times in Apointments+, but only if they are in the appointments+ calendar. The problem is that I have events that are in 5 different calendars in google for purposes of our own internal organization, and I'd really like to be able to have them all show up as unavailble in Appoitnments+ w/o having to reassign them to the appointments calendar. Is that doable?