[Classicrendezvous] When were Mavic GP4's around?

Example: Framebuilders:Dario Pegoretti

Date: Sun, 26 Nov 2000 22:21:37 -0500
From: Steve Freides <sjf11@idt.net>
Organization: Friday's Computer, Inc.
To: Classic Lightweights <Classicrendezvous@bikelist.org>
Subject: [Classicrendezvous] When were Mavic GP4's around?

I've used GEL280's and GL330, and I've got some that are earlier here (forget the name right now). What about GP4, when were they? Is there any Mavic timeline online somewhere?