run: GBggDecoder.exe
Decode GameGenie GB values to patchable values
based on the javascript implementation @ https://games.technoplaza.net/ggencoder/js/ example values: https://gameboygamegeniecodes.blogspot.com/2012/08/super-mario-land-w-v11.html
More example gg codes can be found over @ https://gamehacking.org/game/2008