Hi pambulabeach,
Thanks for the follow up!
For your additional question, we'd suggest providing more specific detail. What exactly is "ical"? Is this some sort of third party calendar service you have linked with your Google Calendar and are now trying to link it with the Calendar application on Apple devices?
This information will help the community to better understand exactly what you're trying to do/set up in the Calendar application so members can provide more relevant responses.
Are you talking about just sharing a calendar with someone else, or someone else sharing a calendar with you? If so, here's those steps: Share a calendar on iCloud.com
Shared calendars work the same way as your own calendar in the Calendar application on Apple devices. Changes made to a shared calendar would sync with all devices that are viewing that calendar right away.
The community looks forward to your reply!