GAP 4.8.9 installation with standard packages -- copy to your CoCalc project to get it
#g2 f1 5x5 -1 0 0 0 0 2 1 0 0 0 -2 -1 0 1 -1 1 1 1 0 1 1 1 0 -1 0 5x5 0 0 1 1 1 1 0 -1 -1 -1 0 1 1 1 1 0 0 0 0 -1 0 0 0 -1 0 5x5 2 1 0 0 0 1 2 1 0 0 0 1 2 1 1 0 0 1 2 0 0 0 1 0 2 2^8*3*5 = 3840 dim5/5-1b