Let ?n be the standard Gaussian measure on Rn. We prove that for every symmetric convex sets K,L in Rn and ??(0,1),?n(?K+(1??)L)1n???n(K)1n+(1??)?n(L)1n, thus settling a problem raised by Gardner Zvavitch (2010). This is analogue of classical Brunn–Minkowski inequality Lebesgue measure. also show that, fixed ??(0,1), equality attained if only K=L.