GAP 4.8.9 installation with standard packages -- copy to your CoCalc project to get it
############################################################################# ## #A chap4.tst PatternClass package Ruth Hoffmann ## gap> START_TEST("PatternClass"); gap> LoadPackage("patternclass",false); true gap> SetAssertionLevel(1); gap> a:=Seqstacks(3,3); [ [ 2 ], [ 3, 5 ], [ 2, 4 ], [ 3 ], [ 6, 8 ], [ 5, 7 ], [ 6 ], [ ] ] gap> aut:=GraphToAut(a,1,8); < epsilon automaton on 6 letters with 680 states > gap> a:=Parstacks(5,5); [ [ 2, 7 ], [ 3, 12 ], [ 2, 4 ], [ 3, 5 ], [ 4, 6 ], [ 5 ], [ 8, 12 ], [ 7, 9 ], [ 8, 10 ], [ 9, 11 ], [ 10 ], [ ] ] gap> aut:=ConstrainedGraphToAut(a,1,12,5); < epsilon automaton on 12 letters with 5074 states > gap> STOP_TEST( "chap4.tst", 10000 );