Summary: In the paper, new Fritz John type necessary optimality conditions and new Karush-Kuhn-Tucker type necessary opimality conditions are established for the considered nondifferentiable multiobjective programming problem involving locally Lipschitz functions. Proofs of them avoid the alternative theorem usually applied in such a case. The sufficiency of the introduced Karush-Kuhn-Tucker type necessary optimality conditions are proved under assumptions that the functions constituting the considered nondifferentiable multiobjective programming problem are \(G\)-\(V\)-invex with respect to the same function \(\eta\). Further, the so-called nondifferentiable vector \(G\)-Mond-Weir dual problem is defined for the considered nonsmooth multiobjective programming problem. Under nondifferentiable \(G\)-\(V\)-invexity hypotheses, several duality results are established between the primal vector optimization problem and its \(G\)-dual problem in the sense of Mond-Weir.