I am not sure what you mean exactly.

GT works on all desktop OSes (and on Android). It works with Git for all sources. It can interoperate with the file system. It works with other runtimes like JS or Python. It works with the debugger adapter protocol to help accommodate other runtimes. It works with language servers, too. It even interoperates with an embedded webbrowser (through WebView on Mac and Windows) both ways.

That's not quite a lack of interoperability, or?