I found a patched version of GD graphics library with added gif support:
http://www.rime.com.au/gd/
but there's only source code, I don't quite get it how to compile it with Visual c++6 /nmake. what I need is the gd.dll library for perl (to use with patched gd.pm available from the same site) and the php extension library php_gd.dll . Is it possible to build these dynamic libraries using this source code and then how? At the moment I have only gd.dll and php_gd.dll without gif support, so gif images are not rendered