Are there any plans GSX Pro seated passengers on the PMDG 777-300ER in MSFS 2024 be added in a GSX Pro update in the future?
Not simple to do though as virtuali said in another thread:
Both airplanes are native MSFS 2024 airplanes, their file structure is completely different than those made for 2020 used in 2024 (like Fenix, for example), and our installer will need to be updated to support that, and we need to be sure it works without compromising the files, and being a much more flexible and variable file structure, it's not the simplest thing.
The PMDG 777-300ER and 777-200ER have support for GSX Pro seated passengers in MSFS 2020 by the way.