vCard Wizard Contacts Converter Pro Edition is the easiest way to transfer contacts from Google to iPhone.
Just follow these simple steps:
            
                -  Download, install and launch vCard Wizard Contacts Converter on your PC;
-  Select Google as a contacts source. Log in and click Next;
-  Select iCloud as a destination source and click Next;
-  Choose the contacts you want to transfer from Gmail, confirm your selection and click Transfer.
-  Launch the Settings app on your iPhone, tap on iCloud, Sign in and turn on Contacts in the list of iCloud services.
            In just a few seconds, the contacts you have transferred from Gmail will appear in your iCloud contacts and connected iPhone devices.