BitBuilt modding community how to guides, part information, and tool recommendations.
manual.bitbuilt.net
NOTE: The Wii console MUST be a RVL-CPU-40 or newer revision. Please check the Revision Guide on the BitBuilt Forums to check if your Wii will work for the G-Boy here: Wii Revision Identification Guide
This is a good project to use up a 6-layer board. You can plug your G-Boy into the back via a USB-C to A cable and access all of your games and saves on a TV this way.