I have a Guncon limited edition from years back but, it has PS One connector and a couple of rca jacks. Would that be possible to get it setup somehow?
I also have the proper Red/Blue Happ guns that came with my machine although are not connected right now. Any luck with these running under Mame with a TV screen?
:O Do you mean the LE Elemental Gearbolt gold plated Guncon that only 50 were ever produced and only 3 known copies exist?
Cause if so, that's worth a BIT of money and you might not wanna be up and jury rigging it to an arcade rig. That's the only LE Guncon I know of.

Anyway, no, to my knowledge there is no adaptor or driver for the Guncon 1 to make it work on a PC, not that you probably couldn't build one, it'd be a LOT of work. The Guncon 2 for PS2 on the other hand is already USB based so they only needed to make a PC driver for it and voila.