Copy the files *.gpi to a dedicated directory, e.g. ~/.pari/ Then add the directory name to your pari/gp path, see the file DOT-gprc which is really my ~/.gprc In a pari session import the functions defined in, e.g., the file hypergeom.gpi by issuing read("hypergeom.gpi") or simply \r hypergeom.gpi More useful material is listed on the web page http://pari.math.u-bordeaux1.fr/Scripts/