[[ https://www.gpg4win.org | Gpg4win ]] is the Windows distribution of GnuPG including GUI Tools.
You can find issues reported specificially for Gpg4win below. Alternatively you can search this tracker for all known issues which might also include general issues that are not specific for Windows.
A beta for the next release is available:
https://files.gpg4win.org/Beta/gpg4win-3.1.0-beta-current.exe