Hi TRUEST,
The link I gave you is the main page.
If you look at...
http://www.gnupg.org/gph/en/manual.html
...you will find more than you need to know
about GPG. As Neo states, "you have a powerful
and free encryption engine available with more
features that you could use." I would recommend reading this "manual" first then downloading and
installing this to do EXACTLY what you are
proposing to do. It is extremely flexable and
relatively easy to build and install.