While PPM::Repositories is a lovely module, it isn't really what the fellow was asking.
The short answer is, yes the GD Graphics Library can be installed and compiled on Windows. However, the distribution comes with source only, thus you will need a C compiler to make it work for you. To the best of my knowledge there aren't any binary repositories, although with luck one of the monks will know of one. If you require PNG or JPEG image support you'll need to install a couple of extra libraries. See the README in GD.pm for more links and information.
Barbie | Birmingham Perl Mongers | http://birmingham.pm.org/