This is a basic GSX Profile for Tokyo Haneda (RJTT) using the default FS2024 MS/Gaya scenery (not FS2020, as the scenery is not the same between the sims). I plan on expanding it to touch all currently recognized parking locations in GSX eventually. Currently, the profile is limited to terminal 1 (Japan Airlines (also Star Flyer and Sky Mark)), terminal 2 (All Nippon Airlines (also Air Do and Solaseed)), and terminal 3 (International).

The gates and pushback routes I chose are based on the airport configuration represented in the sim using the default "hand-crafted" RJTT scenery which may be out-of-date and/or not directly comparable to the real world RJTT.

As of version 1.0; all of the gates I did (jetway gates) are mashalled (not VDGS). I will do VGDS in a later update if possible.

As noted at the begining, this is a profile for the default scenery. As such, there are some issues with the scenery I have to work with. So far, the most glaring issues I noticed are:

• Gate 143: The jetway intrudes on the parking line for that gate.
• At terminal 3 the gate numbers in the scenery are not directly aligned with the GSX numbers for those gates.
• Some of the parking lines, exclusion zones, wingspan limit lines at gates, and painted stop points are missing, or not well placed within the scenery. I don't know anything about editing sceneries, so all I could do was work with/around the issues inherent in the scenery.
• If you are reading this and want to help me make this profile better by providing real world knowledge, I will happily implement what I can in future updates.

How to install: Decompress/open the compressed file you just downloaded.
Extract/place the file within the compressed library into the GSX profile folder. The exact location of your GSX profile folder will vary based on your local folder names. Mine looks like this "C:\Users\UserName\AppData\Roaming\Virtuali\GSX\MSFS". 
This is a hidden folder, so be sure to enable Windows Explorer functionality that allows viewing hidden folders.

Basically, it's just drag & drop, but NOT in the "Community" folder.

Bug reports can be made via the comments section here.