That's the thing... "GT" is the in-word amongst luxury marques... which means horribly disfigured rear ends... because, you know... a little less would be a "coupe", and a little more would be a "wagon"... both outdated ideas.
The Panamera is not photogenic at all, but when you see it in person it sort of works.
The last picture of it in white looks like a stretched VW Scirocco limo.