Install Black Dog Technology's GCDual kit in a compatible GameCube console.  This will give you both HDMI as well as RGB output from your Nintendo GameCube console.

A comprehensive install includes the following:

• Install the GCDual kit
  
• Upgrade the GCDual to the latest firmware
• verify operations
• BONUS: If you want to replace the existing fan with a 3D mount + Noctua fan, install a modern ODE (GCLoader), or any other straight forward mod, I will do so at no extra charge

NOTE(S):

• A working compatible GameCube must be provided. This kit will only work with the DOL-001 GameCube console.
• The GCDual kit must be provided by the customer.
• The RGB port will be modified to output CSYNC on pin 3, like all other Nintendo consoles that use this port.