Well, it is part of the RNAV transition which is as far as i know at least RNP 1 (our FMC flies it as RNP 0.3), however ATC usually turns you to final early which leaves the transition and makes those nice turns around the intended line. Vectors to final are the norm for airline traffic.
Sadly GLS is officially down and not usable for the time being until it is through the whole certification process. I have to add though that EDDW is one of those places we do not visit all that often anyway, other operators use it more often, lufthansa has based the CJ1s of its flying school there.