take the Sandyford/Dundrum exit off the M50, take 3rd exit at roundabout, get to next lights and take 1st left, go straight. goatstown cross (i assume the goat grill) is the at 4th set of lights that you meet on this straight run.
I did thanks, but it was Goatstown Cross rather than Goatstown Road that I need. When I put GC into Google maps it brings me to the Southern Cross Route !