Try Gnuplot for advanced graphing. See Gnuplot Samples There is a Perl module for it, gnuplot, and it can also be easily run thru IPC.

The GD::Graph module is not as extensive a toolkit as Gnuplot, but there probably are ways possible to do what you need with a bit of trickery, like use GD to make an reusable axis template graphic, then do an overlay of your statistical data onto it.

You could also, make your own custom graph using the canvas or drawing widget of the various toolkits, for example, Tk Realtime data aquisition