I sftp my .groovy files to my webserver and the changes are auto
reloaded.
It works the same way as it does in php. You simply copy your files to
the server and reload your browser.
If you find a change that is not auto-reloaded, changing the
web.groovy file will create a new classloader and reload
everything(like globas.asa in asp or
asp.net).
I hope this helps.
- David