A fuel gas booster-gas turbine integration for energy saving & optimized operability. The fuel gas booster-gas turbine integration comprises an integrated system comprising a reciprocating compressor based fuel gas booster and a gas turbine wherein the gas turbine flow and pressure control system and the fuel gas booster pressure and capacity control system are synchronized to optimize the fuel gas booster power consumption or the fuel gas booster and gas turbine package power consumption, and wherein the gas turbine flow and pressure control system comprises at least one gas turbine fuel gas input control valve and the fuel gas booster control system comprises a gas turbine fuel gas input control valve position controller, associated to said at least one gas turbine fuel gas input control valve, and fuel gas booster capacity control devices, associated to said reciprocating compressor based fuel gas booster.