Most of the Quattroporte seem to already have the code, in such case it is easier to just ask to update the missing page(s). Writing the query for less than 10 cars usually takes more time than updating manually... (with always a small risk of error, and updating the wrong entries)
III : 1 vehicle updated
IV : 8 (ok this one was maybe worth it)
V : 2
VI : 2
Same for the 3 Ghibli

For the Granturismo it was worth doing it. I see that there is not just "Granturismo" but also other "Granturismo something" models, so I updated them at the same time, as they seem to have all the same code... Hoping there is no side effect applying a code to special Granturismo versions that had another one.