Thats a bit lame Ford doesn’t let you default exhaust setting to be full loud upon start up. Only track and rain/ice resets to tour upon every startup and will stay in sport. Even then I have the exhaust decoupled to the mode so it is in track all the time( valves open) and I can also have the steering and suspension set to my preferred setting if I wanted to( but I leave it coupled to the mode).
Normal is actually pretty loud, there's 4 modes: quiet, normal, sport and track, the latter has a little extra "for track only" disclaimer, and the exhaust also has "auto open" at certain throttle events. However, they did some cool stuff like quiet mode can be set for a time range, so in case you forget, and don't want to anger the neighbors, you can make that cold morning start nice and quiet.
Actually, people in California have even been cited for a 100% stock car in the Sport and Track modes, so I think they simply defaulted to a more conservative mode.
My top controller has an override but I've never used it.
This new GT is generally full of badassery, so this one decision on the designers/engineers part (probably motivated by legal) doesn't bother me at all.