GAP Manual: 27.19. Reversed

Reversed( list )

Reversed returns a new list that contains the elements of the list list, which must not contain holes, in reverse order. The argument list is unchanged.

    gap> Reversed( [ 1, 4, 5, 5, 6, 7 ] );
    [ 7, 6, 5, 5, 4, 1 ] 

The result is a new list, that is not identical to any other list. The elements of that list however are identical to the corresponding elements of the argument list (see Identical Lists).