Hello,
gmail Calender invitation sent from my application are not directly getting added to calender invitations.
I have to make them add explicitly by add to calender.
FYI: you can see the link which i found while seraching for this isue.
http://productforums.google.com/forum/#!topic/calendar/cLEu8QVdb3E
If you have any updates on this then please do share.
Need it :(