The integrated cycle implies that, before combustion, methane (primer natural gas component) is mixed with working fluid and converted into syngas (mix of H2 and CO) in a catalytic adiabatic (without an indirect heat supply) reactor by using sensible heat of the hot working fluid leaving, in the simplest case, the gas turbine outlet. The largest part of produced syngas (about 75%) is directed into the combustion chamber of the gas-turbine cycle to generate power, but another part of syngas (about 25%) is withdrawn from the power generation cycle as hydrogen, carbon monoxide, or their blend to produce chemicals, fertilizers, synthetic fuels, etc. The thermodynamic benefit owing to this modification is substantiated by exergy analysis. There are numerous technological options to separate syngas from working fluid and withdraw it from the cycle (e.g., condensing vapors and removing liquids, taking out gases and vapors by membrane and pressure swing adsorption separation, amine gas treating, and glycol dehydration).