Multiple IP subnets

Hi, I need some help. We received two set of IP ranges/blocks from our ISP for one location. We want to use both IP subnets on one 3750 Cisco switch that has one uplink to the ISP default gateway. Is it possible, to have both subnets with two LAN gateways IP configured on the same switch? Should we create two separate VLANs or is there other way to set up it up? Please show me how it is done? Thanks