GAP Manual: 27.9. IsIdentical

IsIdentical( l, r )

IsIdentical returns true if the objects l and r are identical. Unchangeable objects are considered identical if the are equal. Changeable objects, i.e., lists and records, are identical if changing one of them by an assignment also changes the other one, as described in Identical Lists.

    gap> IsIdentical( 1, 1 );
    true
    gap> IsIdentical( 1, () );
    false
    gap> l := [ 'h', 'a', 'l', 'l', 'o' ];;
    gap> l = "hallo";
    true
    gap> IsIdentical( l, "hallo" );
    false