Must be an aftermarket job Bob, as you're right, front parking sensors aren't a factory-fit option on either the GT MC Stradale or the GC MC.Don't what they are as I don't recall the Stradale having front parking sensors and I've never seen those fitted to other Stradales'.
Don't know if they'd come off. I'd personally rather have sensors on a Granturismo, can't see the front end from the driving seat. Car is now sold anyway guys.