So where are we at this point with the gates compatibility
Let's clarify what we are missing, which is not generic "gates compatibility", if with "gates" you mean Jetways. Jetways work 100% fine in MSFS 2024, mostly because they are NOT handled by GSX so, once you are sure you have the GSX replacement Jetways disabled, you removed the only GSX-related issue with jetways, which will then work (or not) entirely depending how they are made, the airplane, the airport.
Not forgetting the discussed issue caused by nearby Helipads, which of course is completely unrelated to GSX and it must be fixed by MS/Asobo.
Having said that, what we are missing in relationship with jetways in MSFS 2024 are GSX replacement jetways for BARE DEFAULT airports, which always were the only place where you could possibly use GSX replacement jetways in MSFS 2020. With "bare default", meaning not 3rd party, not custom, not handcrafted.
In order to have these updated for MSFS 2024, we need the ability to optionally download the streamed base files, which has been promised, but it's still not there.