To subscribe to calendar on the iPhone:

•On phone go to-Settings(the "settings" app icon)

•Click-Mail, Contacts, Calendars(may have to scroll)

•Click-Add Account

•Click-Other (may have to scroll)

•Under Calendar Heading click-Add Subscribed Calendar

•In server box type:
www.calendarwiz.com/CalendarWiz_iCal.php?crd=gsdcalendar

•Click "Next" button at top