Wow, this is frustrating.
I have Gmail accounts already set up on my iphone. But I am trying to set up a new one, and sync only the calendar. I tried this with an existing account I want to use to see calendar entries on my iPhone and I tried creating a new Gmail account as well. Same results.
On my iPhone4, I went to Settings-Mail, Contacts, Calendars-Add Account-Gmail. I put in a name, the full email address, the correct password, and a description. When I save, it verifies successfully. Then it asks me to turn on Mail, Calendar, and/or Notes. I only want Calendar for this one (although I have tried selecting each of the others as well. I've tried this many times now) so I turn it ON and the other two OFF and press SAVE.
It says "Adding Account" at the top. Next to that is the spinning circle wait cursor icon. And it stays like that forever. At least 15 minutes with me touching the screen everytime it went dim.
I also tried it a different way. I added the account as described above except I left everything off (Mail, Calendar, Notes). The account did add! However, when I went back into the account and tried to turn on Calendars, it says "Turning On Calendars" with the spinning circle. And stays that way forever. Once again, I let it sit that way for 15 minutes as well.
Help?
View the Correct Answer Cannot setup new gmail account in iPhone Help , Answer Mail, Contact , Calendar iPhone Question