Forgot to add this yesterday.

Most Green Mini Bus routes should now be available on your bus app - Citibus, New World and HKeMobility...

Don't know if this is real time info (GPS based) or just timetables uploaded with some inshallah vibes.

A spokesman for the TD said, "The GMB Real-time Arrival Information System has been operating smoothly since it was launched last year. With the support of the GMB trade, the TD has uploaded the real-time arrival information of a total of 313 GMB routes in four phases last year. Further to the current extension to 391 GMB routes, the TD will continue to work closely with the trade to upload the real-time arrival information of the remaining some 150 GMB routes in phases, with a view to achieving full implementation by the end of this year."
https://www.info.gov.hk/gia/general/...2033000212.htm