SDL port uses GTK, so it would be a hell amount of work to rewrite it. XBOX port uses DirectX so no way for it.
Besides, both ports have a MIPSIII->x86 dynamic recompiler so it would take an enormous effort to replace it with MIPSIII->MIPS32 recompiler (which doesn't exist).
Technically it's possible to have KI on gcw0 but who will take this job?