Whoops. Typo. The airline did NOT subscribe to the Boeing AHM data subscription service that would have provided GPS data via the Iridium link.
I think there are two separable points there. First, does the reporting system include GPS (and related, can the GPS part be independently disabled); and then, does Boeing share the AHM data with a subscriber.
My impression is that RR and Boeing get the AHM data, period. They pay for it in the first place. The airline can get a copy of it if they pay Boeing.
I haven't read anything about the AHM data including GPS coordinates, just engine-relevant performance information.