save the graphpage using a command

Dear gretl list,

is it possible to save a 'graphpage' by a command? I compiled a bunch of 
figures (each includes more than one line to plot) and I would like to 
plot some of them on a single page (multiplot). The 'graphpg' command is 
suitable for this, but only as long as one saves the produced page 'by 
hand' each time. If one wants to save many graphpages, e.g. in a loop, 
this is quite time-consuming, and it would make things much easier if 
one could save each page as pdf/eps/... by a simple command e.g. like 
'graphpg --output=filename.*' or so.
Of course one could use gnuplot for this, but I think it gets a bit more 
complicated if one uses strings-chacraters producing figures; but maybe 
I am wrong here 

Best,
Artur