pico pi Gameboy video board

Hi, I’m relatively new to pico pi and developing for them. I’m currently trying to write code to convert the video input from an original gameboy to composite video. Currently there are several GitHub accounts with this functionality for VGA output, and though that does work when I tested it, needing two steps for this project seems wasteful DMG>VGA>composite not a great workflow. DMG>composite should be a bit easier but my lack of skills in programming in this language and confusion on video signals have left me stuck. This project has become less fun as I go on and so id appreciate any help in figuring this out. Here are two examples of the vga version for reference. Photo of my pico running vga. https://github.com/andy-west/consolized-game-boy https://github.com/joeostrander/consolized-game-boy