He obviously wants to have Carabinieri-like liveries, something like this:
Unfortunately there is no Giulia in GT:S yet, but we surely can use the 4C.
While we are at it, a bit of inspiration by police car liveries used in real life:
Porsche 911 (993), used by Stuttgart's Autobahn police from 1996 until 2004. It was a gift by Porsche to the Stuttgart Police Department, the 1 millionth Porsche produced in the main production plant in Stuttgart-Zuffenhausen.
In use by the Polizia Stradale in both Rome and Bologna, the Hurracan:
I'm not able to reproduce these liveries yet (5hours, 45 minutes and 34s still to go). I can't wait to see what awesome liveries are going to be reproduced.