GAP 4.8.9 installation with standard packages -- copy to your CoCalc project to get it
#############################################################################
##
#W id1875.z GAP library of id's Hans Ulrich Besche
##
ID_GROUP_TREE.next[1875]:=
rec(
fp:= [ 1 ],
next:= [ rec(
fp:= [ 15 ],
next:= [ rec(
fp:= [ 57056, 66198 ],
next:= [ 21, 20 ] ) ] ) ] );