To install this (or any other) module, try PPM.

From a command prompt, enter
PPM install GD

There are many PPM options - see "perldoc ppm" . GD 2.12 is available as a PPM install, so no need for the compiler.

For future reference, you will need the "nmake" program in your path. If you need to compile, build and install a module, use the Visual studio command prompt, then go to the package path, and follow the README instructions for the modules, which usually say
perl Makefile.pl
make test {You should type "nmake test"}
make install {You should type "nmake install"}