Project homepage of Grsync for Windows: http://grsync-win.sourceforge.net/
Grsync package contains own
Cygwin environment installation, which can coexists in Windows with the regular
Cygwin installation, but in the
Grsync package is included own (mostly older) version of line
rsync client, which is used by
Grsync to transfer the files, this fact may be a bit confusing.
For use cases please go back to: Rsync