Link to iPhone calendar:

https://calendar.google.com/calendar/ical/sjpb1vkbfobs4crqpi57ghl0j4%40group.calendar.google.com/public/basic.ics

Open Google calendar in new tab:

https://calendar.google.com/calendar/embed?src=sjpb1vkbfobs4crqpi57ghl0j4%40group.calendar.google.com&ctz=America%2FChicago