Based on version 0.37.0, the one installed by hombrew on osx (
brew install libgr).
Very incomplete: I don't know how to thead with the meta thingy in ctypes, and I have yet to bind the GKS library (which includes all the constants for the plot styles).
The documentation is published here: online documentation.
libGr is only looked through the default library paths of your system. you can customise this by specifying the complete absolute path of
libGR.so with the environment variable
with-test & >= "0.6.0" & < "0.9.0"