GAP 4.8.9 installation with standard packages -- copy to your CoCalc project to get it
gap4r8 / pkg / carat / carat-2.1b1 / tables / qcatalog / dim4 / dir.1,1;1;1 / ordnung.4 / (2)^2(8)^1 / min.19
561053 views#g2 4 -1 0 0 0 0 -1 0 0 0 0 1 0 0 0 0 -1 4 1 0 0 0 0 1 0 0 0 0 -1 0 0 0 0 -1 2^2 = 4 % order of the group