[3boos]

make sure that you have the latest ROM version, if you don't, head to htc.com and upgrade your rom, then from the IE on your phone go to google and try to download the Gmail application, it works for me.

But if you are trying to add it on the phone make sure you head to your Gmail account look for the seetings under the Forwarding and POP/IMAP Tab in the account settings, and on the phone when you are trying to add the new email, just ignore the first step or enter a wrong email that will force you, in the following step, to enter the provider of the email account and the type of it.