> BTW, what is gs-papersize? I found neither manpage, nor Info node.
It's the gs binary.
In order to process your /etc/papersize, I had to add a wrapper
programme to the gs package (and call this wrapper programme "gs",
so that it gets executed when you type "gs"). /usr/bin/gs
reads /etc/papersize, possibly adds the correct papersize to the
argumentlist, and then executes /usr/bin/gs-papersize.
If you've got a better name please tell me.
(Your gs maintainer)
Use Debian Linux!