The solution to this problem requires you to interact with the OS, so a solution that requires tools found in the OS itself isn't a bad one. Its so simple you can have a script triggered by a desktop shortcut and be done with it.

That all said, a simple GUI API provided by the OS for simple programs like this would be nice, just to give the user better feedback on the process. Is it done? Is it doing anything? Did it run correctly? Etc.. Zenity on linux kinda does that but is not guaranteed to be installed...

Why do you need that in gui when you already have it in cli through pid?