AFAIK, the PGP(.com) program is indeed commercial and they have patented their "IDEA". I also heard that the FBI (or whatever three-letter US department) tried to persuade the company to build in a backdoor, which PGP claims not to have done.

With GPG I indeed mean GnuPG, the Open Source variant of PGP (and based on OpenPGP). And their website is (how original) http://www.gnupg.org/. On that site, they say:

GnuPG is a complete and free replacement for PGP. Because it does not use the patented IDEA algorithm, it can be used without any restrictions. GnuPG is a RFC2440 (OpenPGP) compliant application.