To be honest, The Super GT isn't useful as before, it's seldom you find someone who is using it or driving it continuously and I suppose it's due to the current variant. But as long as it's speed vehicle, and it might be useful for criminals/civilians and even the law side. I believe that it's an easy suggestion to be implemented and add the new variant. Subsequently, the vehicle itself will be useful by players since it has a good view nor awesome alter look. Not to mention that the variant that you've stated in your suggestion is realistic and creative. Also, it won't harm since it's a pickable variant(s). Therefore, it might be a great addition so I am definitely supporting this suggestion.