Do you have the calendar subscribed in your google account? If so it "should" just be listed as one of the calendars when you attempt to add a calendar for the account.

Yes, I have (see i phone) calendar in my google account. And I´m main account to our family calendar. But I didn´t see this calendar there.

When I choose "add calendar", I must choose locally or network (but I don´t want add other account - e.c. gmail). Web address is same as for gmail account currently used in Thunderbird.