This version of ghostscript support shared modules dynamically loaded at run time. There are currently two modules compiled with the Mandrake version of ghostscript, one to support all X11 devices (typically used by gv) and another to support the svgalib devices. Look at the ghostscript-module-??? packages. There is no configuration needed, just can add (or remove) the package to add (or remove) the devices concerned in ghostscript.