Few things here...
1st) Stan handed over GW to Scragg last year maybe 2019 for the purposes of FFXIAH data mostly. If you have a sub to GW what you're really supporting is FFXIAH at this point. Since almost nothing GW does outside of handing data to FFXIAH is really worked on by Rooks.
2nd) The fix is super simple(memloc location change) for server ID, the problem at hand is it's not the GW Plugin but the exe file the plugin grabs that needs the update and to be recompiled. Outside of Stan no one has tried the compile the thing in like 7+ years but everyone's dev environment has drastically changed since back then.
Rooks has gotten Scragg to give Arcon(Windower Team) access to the exe repo but he's having a hell of time getting it to compile.
This one might take a while.
no offense but other than rooks that's a bunch of names who look at ffxi once a year. i'm in strong agreement with draylo, which is painful to say. would be nice if someone would maintain these things that's invested in the game. seems unlikely though. also from a programmatic look at things if you have the source changing something this simple even with the most spaghetti of code should at max take an hour. i'm gonna say it hasn't been looked at.
at the same time though if there's no money in it, like is claimed, they should have no problem passing the project off to someone who actually wants to work on them.
i'm guessing the "theres no money in it" is a complete lie though. hosting costs are basically nothing these days