OPNO is the open category which means general category of upsee. Well according to me if you compare G.L.Bajaj and Galgotias University,  GU is far better than that as it is a deemed university hence it's syllabus is a bit upgraded than that of G.L.Bajaj as it linked with AKTU. But the decision is all yours you can compare the fee structure and placement records of both institutes then decide which suits you best 

Good Luck