I don't think it will fit. The GC8 strut bars have a different part number for cusco etc. I'm sure you could make modifications to the mounts and "make it fit" though, if you wanted to spend the time.
I don't know if it'll clear the intercooler, I think the GD bars are designed with more space for that reason. That, and the strut towers may be wider on a GD, so the GC bar might not be long enough.