Windows isn't supported, but I'm going to guess that adding Windows support wouldn't be impossible. GTK is definitely cross-platform, I don't think neovim has a

Windows isn't supported, but I'm going to guess that adding Windows support wouldn't be impossible. GTK is definitely cross-platform, I don't think neovim has any changes that would make it any harder to build for Windows than vim, and you can get POSIX calls through cygwin or MinGW. Might actually make a good project for anyone wanting to get into rust on Windows.