I can't transfer my conacts from my gmail to my iphone 5?

So i managed to get all my contacts from my old blackberry onto my google/gmail account on my laptop. Now when i connect my new iphone 5 into itunes and the clikc info there's no option for me choose sync contacts from google, there's no drop down menu (as the apple website says there should be) Please can someone tell me what i'm doing wrong. By the way i have the most up to date itune possible so it doesn't look like your typical itunes

Transfer to outlook instead and go to contacts and click outlook then it will transfer or just use an app called contacts manger and download it will get your contacts and then send to email you can then open on iPhone n save

On your iPhone:

Settings

Mail contacts and cal

Add account

Gmail

Enter your info

Chose to sync mail contacts and cal

As if by magic all of your gmail contacts appear on your iPhone

Hope this helps