GAP 4.8.9 installation with standard packages -- copy to your CoCalc project to get it
#g2 % space group to the point group of min.108.2.3 and cozycle coz 6 /2 % generator 2 0 0 0 0 -1 0 -2 0 0 0 0 0 0 0 -2 0 0 0 0 -2 0 0 0 0 0 0 0 -2 0 0 0 0 0 0 2 6 /3 % generator 3 0 0 0 0 0 0 3 0 0 0 -1 0 0 0 3 0 0 0 0 0 0 -3 0 0 0 -3 0 0 0 0 0 0 0 0 3 % order of the group unknown