Thanks to this great and open source package, I implemented the output curve 2d display with minimu effort and great visual effect for a EMC simulation package development project. In this project, G is used to plot circuit parameters, such as current, voltage, etc, with Cartesian coordinates. Note that, the G package comes with some basic image controls, like zoom-in, zoom-out, and localized magnification.
The following is a screen capture of the curve plotting generated by G from the EMC project.