My gas got shut off and won't be back on until next week. Is there a way to use the heat without gas since it's dual heat?

It depends on the control that conrols the gas side. With some of the newer systems, switch over and lock out of the furnace and heat pump is done from the thermostat. If you don't tell the system not to use the furnace, the system will lock out and you will not have gas or heat pump --heat.