From their http site:
The gd library is temporarily available. We have taken it off the
site until we are able to arrive at an agreement with Unisys regarding
their legal position with respect to gd. Please do not send email asking
for the gd library at this time. We cannot send it to you, at least until
this matter is resolved. Thank you for your understanding.
Boutell.Com, Inc.
Reported by: "Stephen J. Roznowski" <sjr@home.net>