GAP 4.8.9 installation with standard packages -- copy to your CoCalc project to get it
#(C) Graham Ellis, 2005-2006 ##################################################################### InstallGlobalFunction(PermToMatrixGroup, function(arg) local G, n, gensG, gensA, A, GhomA, M, g, row, i,j; G:=arg[1]; if Length(arg)=2 then n:=arg[2]; else n:=Maximum(MovedPoints(G)); fi; gensG:=GeneratorsOfGroup(G); gensA:=[]; for g in gensG do M:=[]; for i in [1..n] do row :=List([1..n],x->0); row[i^g]:=1; Append(M,[row]); od; Append(gensA,[M]); od; A:=Group(gensA); GhomA:=GroupHomomorphismByImagesNC(G,A,gensG,gensA); return GhomA; end); #####################################################################