Sorry, the SNES cable will not work with the Gamecube. The North American Gamecubes do not output the required signals from the Analog A/V port. Only the European Gamecubes do and, as such, we probably will not pursue any sort of cable using that A/V port. On the other hand, a project we had our sights on for a while would be duplicating the official Gamecube Component Cable. This is the one that goes in the Digital A/V port, which unfortunately only half of the Gamecubes have. Nintendo dropped the port sometime during the Gamecube's life to save on costs. Although it is a project we would like to do, we can't delegate any resources to it right now.