Can I get my Google Calendar shown in my iCloud Calendar on my PC?
You need to "subscribe" to the iCloud calendar from your Google calendar.

In iCloud:


Click the Share button to the right of the calendar you want to share, then select Public Calendar.
Click Email Link.
Type your Gmail addresses in the To field, then click Send.




In Google:


Copy and paste the link from the email you receive into Google’s “Add by URL” field in the “Other Calendars” section.
It can and most often WILL take up to 24 hours for events from the subscribed calendar to display in Google.