A list of Gnostic links is at:
http://www.hughes.net/~scheper/#Links

GNOSIS
is "A Journal of the Western Inner Traditions (ISSN 0894-6159), ...a quarterly magazine devoted to the exploration of the spiritual and esoteric paths of the Western Hemisphere." Much of its material deals with Gnosticism.
http://www.lumen.org/about_gnosis/about_gnosis.html

The Gnostic Network
contains "An Exploration Into the Spirit, the Creator And the Nature of the Universe"
http://www.trufax.org/menu/gnostic.html

The Gnosis Site is at:
http://www.teleport.com/~jhjensen/gnosis/gnosis.htm

The Gnostic Friends Network
has a description of ancient Gnosticism at:
http://www.enemies.com/index.html