This project is now inactive. There will be no more updates.
At the time this software was written, data processing on GPUs was only possible using OpenGL. Today, there are far better alternatives.
Download the latest version from the SourceForge project page.
There is a
public Git repository
It also has a web interface.
To use the Git sources, you need the developer packages autoconf, automake, gperf, gettext, and doxygen. Run
autoreconf -i in the fresh checkout to create a configure script.
After that, you can run
./configure; make; make install as usual.