Yes was aware ASSY had implemented Cat I GBAS procedures. Just not sure if they were able to support independent parallel approaches using same NTZ as ILS.
Not able to do independent parallel approaches (yet). It will happen at some point.
AIP ENR 1.1 - 53 para 24.2.2
Independent parallel approaches in IMC require the use of ILS.
GLS cannot be used for independent parallel approaches in IMS.