Problem getting Echo to recognize iCal events in Google Calendars

[sojoey]

Hi there,
I have found a few posts related to this but no explained solution. 
I am a newbee to Alexa, and I use iCal to create my appointments.  When I create ical events I can get them to show up on Google calendars App and web page, under the "other calendars" section.  But when I ask Alexa what's on my calendar, she doesn't see any of the ical events.  Only events created under Google account.  Anyone have any ideas how to remedy this?

Thanks so much.