Can't create icloud account with gmail address
I've tried creating an icloud account using my gmail account but when i try to sign in using it, I keep getting the
"Your Apple ID must be a full email address to sign up for an iCloud account." message.
I've verified the gmail account in appleid.apple.com as requested but i'm still getting the message.
I've searched Google for answers to no avail.
Can someone help?
MacBook Pro (Retina, 15-inch, Mid 2015), OS X Yosemite (10.10.4)