itch.io

So this isn't quite what you're looking for, but there are a couple of ways you can turn a GBS-made game into essentially a Windows executable:

1. Once your ROM is exported, bundle it with an emulator then create a .bat file to immediately launch the ROM (I've been bundling my GBS games with SameBoy this way)
   1. I first made a "Rom" folder within the SameBoy directory
   2. (Obviously) I put my ROM in it
   3. I made a .bat file (which, if you're not familiar, is as easy as creating a .txt file then changing the file extension to .bat) containing the following code:
      @echo off
      start sameboy_winsdl_v0.16.2\sameboy.exe ".\sameboy_winsdl_v0.16.2\Rom\[YourGameName].gb"
   4. When you run the .bat, the emulator will launch straight into your game.
2. There's also a tool called Bubble Wrap, although I haven't tried that one out myself yet.