Syntax:
set terminal gnugraph {"<fontname>"} {<fontsize>} {type <pt>} {size "<size>"}
which defaults to 10-point "Courier".
For type, the following options are accepted: X, pnm, gif, ai, ps, cgm, fig, pcl5, hpgl, tek, and meta (default). The size option (default is a4) is passed straight through to plotutils, it's the user's responsibility to provide correct values. Details can be found in the plotutils documentation.
Examples:
set terminal gnugraph type hpgl size "a4" set terminal gnugraph size "a4,xoffset=-5mm,yoffset=2.0cm" type pnm
There is a non-GNU version of the gnugraph driver which cannot be compiled
unless this version is left out.