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From GridPACK
If you are downloading GridPACK then you will need to build both the GridPACK framework and the related libraries. Information on how to do this can be found on the Building GridPACK from Scratch page.
Release notes for GridPACK are available here. Go to the GridPACK release page and click on the link GridPACK-X.X.tar.gz to download the GridPACK release.