In essence Jon Sibal has captured the appearance of the "Shooting Brake" because of the angles he has chosen to represent his ideas there is some details which are not evident such as how the roofline is more coupe like to the rear when looking side on.
When lined up against a conventional 5er Touring in this case the F11, The 5er is much taller , whereas the Shooting Brake sits much lower and has a more sloping roof towards the rear of the car , The rear quarter light is smaller than the 5er Touring.
Overall there are distinguishable details between the shooting Brake and the Touring. The Gran Coupe is similar when compared to the height of both the 5er and 7er. In order of height when facing the car , the order is Gran Coupe , 5er , 7er. there is a noticable difference between these cars.
The Gran Coupe has had an additional twin in the form of the Shooting Brake ,conceived because within the Premium segment it has become apparent that there are customers looking for the next stage in a luxury automobile. Other BMW's that formed this idea included the stillborn CS Concept and car's that made it to production the BMW X6 and BMW 5er Gran Turismo.
Shooting Brake is seen as initially the "second car" The car that will be used mostly at the weekend for the customer who works in the city and retires to his weekend retreat in the Hamptons are whatever?
The car that will fullfill the weekend requirements , Golf @ the Country Club , purchasing a piece of antique furniture , Polo , A trip to the beach etc, all in luxury
The split tailgate entails a classic "Shooting Brake" style in which a picnic can be laid on the lowerhalf of the tailgate or could be used as a temporary seat to watch the afternoons proceedings of an event.
It uses the evocative "Gran Turismo" titile because it shows like the F07 It is all about travelling in style.