All non-isomorphic OA(24,6,2,3)s, their GWPs and GMA ordering (.n means that the design ranks number n in the GMA ordering):

Orthogonal Array             GWP and GMA Ordering
OA(24,6,2,3).1                (0, 0, 0, 1.666667, 0, 0.444444).2
OA(24,6,2,3).2                (0, 0, 0, 1.666667, 0, 0).1