This problem can circumvented by reducing the media size of the document. Adobe Acrobat seems not to be able to display documents if the dimensions are too large (while other viewers might be).
Try running
gs -o out_a.pdf -sDEVICE=pdfwrite -dDEVICEWIDTHPOINTS=[half-width] -dDEVICEHEIGHTPOINTS=[half-height] -dPDFFitPage -dCompatibilityLevel=1.4 -dEmbedAllFonts=true -dDownsampleColorImages=false -dDownsampleGrayImages=false -dDownsampleMonoImages=false -f out.pdf
with [half-height]
and [half-width]
half the previous values and out.pdf the output of your initial ghostscript command.
If it still does not work, you may want to try even smaller values.