With OS. functions (including OS.execute) you don't need any third party things or GDExtensions from my point of view. You might check it out if you haven't. I

With OS. functions (including OS.execute) you don't need any third party things or GDExtensions from my point of view. You might check it out if you haven't. I am working on a real file browser in 3d and execution launches applications natively in linux for example. It's not launched "within Godot" per se. As for the GPL thing: that's exactly the point! Wish you the best in future Godot dev.