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.
Please reread post 47. There are 2 data down link systems. The ACARS does not provide GPS data; only engine parameters. It available to the airlines for free. The AHM is a subscription service. The airline must pay a monthly fee to get the data. It includes GPS data. MAL did not subscribe so they did not get the data.