Yes when I phoned Maserati UK for the build spec on my 4200, the adviser did comment that all UK 4200s and GSs where delivered with skyhook suspension, even though certainly for the 4200, it was actually listed as an option on the price list.
Yes Skyhook was certainly standard on UK GS. See last paragraph below. But it certainly was not standard in all markets. Actually not having Skyhook might not be a bad thing since the most common complaint of engaging Sport mode on the GS for faster gearchange and better exhaust note is the suspension mode not being independent of that
<extract from UK GS Brochure>
maximum power delivery has been upped from the original 390 hp to 400 hp (295 kW)
too, thanks to special development work to reduce internal attrition and careful work on
the intake manifolds and valve seats. The engine has been combined with a sports exhaust
system that is instantly recognisable, thanks to the unusual design of its twin chrome
exhausts and was designed to give enthusiasts that instantly recognisable deep, full-bodied
rumble. Thanks to an electronically controlled pneumatic valve system, even more can be
made of the exhaust by pressing the “Sport” button on the central console too.
The Maserati GranSport is only available with the six-speed
electro-hydraulic transmission in which the gears are changed
using paddles mounted behind the steering wheel, a feature that
further enhances the car’s sporty personality. The Cambiocorsa
systems allows drivers to choose between various gear shifting
modes (Normal, Sport, Automatic and Low Grip),
and in the case of
the Maserati GranSport, is controlled by specific software to
speed up gear changing in all driving conditions. Even with
respect to already very highly developed Coupe Cambiocorsa
system, the Sport mode in the GranSport offers 35% faster gear
changing on average and also boasts automatic heeling and
toeing to make dropping down a gear even faster. Thanks to the new Cambiocorsa
software, the Maserati GranSport can sprint a whole kilometre from standstill in a
breathtaking 23 seconds flat.
The gear shift ratios are specific too, with the adoption of a sixth gear that is 5% longer,
which, in combination with its more powerful engine and improved aerodynamics, allows
the Maserati GranSport to improve on the already blistering speeds of the Coue,
delivering a top speed of 290 km/h.
As with the other models in the Maserati range, the driver can choose between two levels of
gear changing. Normal mode is more comfortable and typical of
Grand Tourer driving, while with a touch of the Sport button on
the central console they get to feel the true power of the car. The
Sport mode delivers a much faster gear changing, a deeper
exhaust sound and less invasive use of the MSP stability and
traction control system. The Skyhook suspension
system, which offers continuous damping control, is also affected
by the driver’s choice of Normal or Sport modes
<end>