Yup, we do run autoland trials with a honeywell GBAS ground station as well, works like a charm. However currently GBAS is officially offline in EDDW and malaga because in both countries the ground station is currently running through the certification process. The DFS in germany plans to introduce GLS approaches in EDDW, EDDM and EDDF as soon as the ground station is certified and the DLR currently runs a test ground station at EDVE.
Generally GLS should support complex approach paths (curved, different descent angles in one approach etc) right out of the box, sadly our airborne equipment doesn't support that yet as the 737 approach mode cannot cope with approaches like that. Even for normal RNP AR curved approaches we have to use LNAV/VNAV instead of IAN although IAN is usually the preferred method.
EDDW GLS 27,
EDDW GLS 09 and for comparison
EDDW ILS 09.