You mean the GLS capable MMRs on the newish 737s, right? To my knowledge Boeing still doesn't offer any form of SBAS (be it WAAS or EGNOS) capable MMRs as a factory option... Even GLS seems to be dying out before it was even used properly (quite like MLS), the newest 777s don't even have the option for GLS option anymore and don't come with the third GPS antenna and the GLS VDR
