While we still don’t know if Samsung will eventually launch a Galaxy S5 GPE, a render that allegedly shows this variant of the flagship smartphone was posted today by @evleaks. The weird thing about it is that it has both hardware, and software navigation keys. Unlike the regular Galaxy S5, which runs Android 4.4 KitKat with Samsung’s TouchWiz UX on top of it, the Google Play Edition obviously runs stock Android KitKat (with a stock Android launcher).
A similar Galaxy S5 (with both hardware and software buttons) is currently being showed by Google on the official Android website, among other Google Play Edition handsets. So, as absurd as this may be, perhaps this is what the S5 GPE will offer, indeed: two sets of navigation buttons.
When (and if) the Samsung Galaxy S5 Google Play Edition will be released, it will probably cost $600 or more - since it's going to be sold unlocked. Let’s hope it won’t be long until we find out more about this.
Update: @evleaks posted another Galaxy S5 Google Play Edition render that doesn't show software navigation keys (this might be the real deal, folks):