Questions about installing Google Wallet in Canada

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http://androidforums.com – So I am living in Canada, and Google Wallet is not her yet. It doesn't even show in the playstore. I did some research knowing that I can root the phone and fool the server as I was using American carrier such as AT&T, Sprint, etc. However, rooting a phone brings security issues. So, I am just curious if I can root an Android phone in order to install the app, and then unroot it. Will the app disappear after unrooting it? It is still an official app from Google, right? Thank you! (General)