Can I set currency in url ?

When marketing (specifically PPC) I want to set the landing page to the relevant currency for the user, for example :

When I target UK customers I want the screen to default to GBP, and when I target USA customers I want the landing page
to default to USD.

Is this possible from the URL ? I have seen it done before something like http://www.mydomain.com/?currency=GBP

Is this possible with this ?

Thanks
 
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