We did have someone on the Go team at Google specifically in charge of the Windows port, but they left and we don't have a replacement at the moment. Various of us have been doing Windows-related maintenance and fixes, especially around the builders, so it's not abandoned, but we don't have a real expert.
If you or Alex Brainman or anyone else +2 a Windows CL and run TryBots successfully, it should appear in
https://go.dev/s/needs-review, and then someone here at Google will skim and +1 it as part of the weekly open source duties rotation. That CL doesn't have the TryBots passing yet. The rebase+rerun helped but it looks like maybe the 386 port has a real problem.
Best,
Russ