I'm not really aware of any way to convert an entire godot project to gamemaker. You're probably gonna have to manually remake the entire thing.
However converting the shaders to gamemaker might be easier if that also works for you. I think gamemaker allows GLSL shaders, and these shaders are written in the godot version of GLSL.
Thanks for letting me know. I did not know that gamemaker supports GLSL shaders, nor am I sure of how to covert it, but I will look into it. Thanks once again, I love the work you do and games you make. (P.S, the game is infinitely generating, meaning if I didn't port this , I would have to download a lot of planets of each type by hand, which is why I was wondering)
:)
I haven't used gamemaker, so I don't know myself how shaders work in that. But from some searching it looks like they do support glsl.
Yeah I think if you want infinite planets, using the shaders directly is your best bet. That way you also have all the control over the shader settings and stuff. Glad you like my stuff, good luck with the game!