there is an easy and fast way, to add GB (Gameboy 1) - Emu and Games,
if you have already GBA included.
In AppData/Roaming/mGalaxy ..., copy the "Nintendo GBA" Folder to a second "Nintendo GB", and put in any Gameboy-Icon.png (icon.png). Should find someone at Google.
Systems.xml File: Copy the <system> Part of "Nintendo GBA" in a second XML Part "Nintendo GB",
at the bottom of the Block, edit the File Extensions value to ? .gb, if you have gamename.gb Files.
Put a Folder "gb" includes Games (.gb Files) into your GBA Folder.
At mGalaxy_runway, only set the App to: VisualboyAdvance (as in GBA)
Path to your new "gb" Folder, maybe .png Pics inside too, for the "Snap" Path.
Ready - now you can play Gameboy One - Games
