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.108.1.2 and cozycle coz 6 % generator -1 0 0 0 0 0 0 -1 0 0 0 0 0 -1 1 0 0 0 0 0 0 0 1 0 0 0 0 1 0 0 0 0 0 0 0 1 6 /3 % generator 3 0 0 0 0 1 0 -3 3 0 0 0 0 -3 0 0 0 0 0 0 0 3 0 0 0 0 0 0 3 0 0 0 0 0 0 3 % order of the group unknown