Suppose that giddir is the directory where you installed GID. Make sure that the giddir is writable for you.
Make in giddir in the problemtypes directory a new directory tochnog.gid. Copy all files from the tochnog/gid/tochnog.gid directory to the giddir/problemtypes/tochnog.gid directory.
For unix, take care that the tochnog.bat and tochnog.bas files are executable (do a chmod +x if required).