According to a thread on the AlfaBB, it stands for Right Hand Drive: G.D. = Guida Destra = drive right = rhd
However, I'm pretty sure you would have noticed if your car was RHD! I'd guess at some point your car picked up a not-quite-correct ID plate? In any rate, you could tell people that in your case, it stands for Giugiaro Designed (even though Giorgetto Giugiaro was working for Bertone at the time) -Paul Witek CBA (currently between Alfas) -- to be removed from alfa, see http://www.digest.net/bin/digest-subs.cgi or email "unsubscribe alfa" to [email protected]
