ILS approaches to a CAT I level will be available in europe only with a ground based augmentation system, WAAS (or EGNOS here) is not deemed sufficient for that. Of course there is a certain hesitation to rely solely on a system where none of the participating parties has any control over, same as most probably nobody in the US is going to use GALILEO once it is live (if ever).
But of course the positive sides of using GPS technology are seen, after all the current GBAS stations can provide for up to 48 precision approaches in around 30NM around the station, very worthwile and cost effective all around. However trials are quite scarce with only two that i know of operating in the last few years, one of them currently withdrawn as the beta level station is being replaced with one that can be certified for normal operational standard (EDDW).