In Texas there would most likely be no such subsidy.
ERCOT runs markets for multiple aspects of energy generation, transmission, and management. Standby or peaking can be just another of those. As long as it is cheaper to provide that service via gas turbines they will win. If batteries become cheaper, they will start taking market share.
My hope is that renewables push the cost per kWh higher for natural gas (due to its run time dwindling) beyond the point where utility scale battery storage is feasible, at which point it's game over for natural gas for demand response/light peaking.
ERCOT runs markets for multiple aspects of energy generation, transmission, and management. Standby or peaking can be just another of those. As long as it is cheaper to provide that service via gas turbines they will win. If batteries become cheaper, they will start taking market share.