Hi out there. For all iOS users having google calendar sync active this is the time to do something about it and change your settings according to the changes at google with deactivating active sync. First of all you have to go to your iOS Settings –> Mail and Contacts and deactivate the calendar sync at the google account you have there.
After you have deactivated calendarsync you have to add a CalDAV Account for your google calendar entries. CalDAV is a standard Calendar Synchronisation protocol. To do this, goto your Settings –> Mail, Contacts –> Add New –> Other –> CalDAV and fill in the server name for google with google.com, your gmail user id and password. After clicking done everything is verified and if everything is ok on opening your calendar the next time your main google calendar entries should be there. If you have more than one calendar as I have, then you have to contact the following google page for including all or some of your calendars to your mobile devices: https://www.google.com/calendar/iphoneselect. When opening you will see a list of your calendars, check all the calendars you want to see on your mobile devices. DONE.