Google Play Codes can be redeemed online at play.google.com and then you can view them on Vudu, Itunes, Amazon or Google Play. They will port to all these when connected together through Movies Anywhere.
If you don’t have a Google Play account just go to the above website and open one. Its free!!! Then go to Movies Anywhere and connect your Google Play Account and all movies will Sync and port to any Vudu, Itunes, or Amazon account that you have connected.