Link to iPhone calendar:

https://calendar.google.com/calendar/ical/sei008l2ssap32d3u84g6t7e3k%40group.calendar.google.com/public/basic.ics

Open Google calendar in new tab:

https://calendar.google.com/calendar/embed?src=sei008l2ssap32d3u84g6t7e3k%40group.calendar.google.com&ctz=America%2FChicago