Hi,
Have you run make && make install in the base folder of the extracted tarball? It does not sound like that. I already tried that and there is no makefile to do that:
15:48:09 /data/x2goserver-3.0.1 : make make: *** No targets specified and no makefile found. Stop.
The git repository is not reachable, proxy does not allow that...
Regards, Enrico