If one only installs the 64 bit binaries for ghostcript and image magick and tries to convert a pdf to an image the program fails.
(with a delagation and image not found error)
One needs to install the 32 bit ghostscript aswell.
(The current 64 bit static imagemagick install tries to use the 32 bit ghostscript program.)
For a future build solution:
Link the 64 bit ghostscript / Or change the ghostscript name in the script in the imagemagick convert program.
(With possibly detecting/trying both.)