The ginac package by default only generates a tutorial in "info" format. However, the upstream package contains the ability to create more complete documentation in HTML, PDF DVI and PS formats. For example, to create full documentation in HTML, all that's required is to add "make html" to the ebuild. I'm going to attempt to add the "doc" USE flag to the ebuild and generate the documentation and post the ebuild, unless someone beats me to it.
Finally done in the just committed ginac-1.4.1!
