Heavy Duty Gas Turbines (HDGT) which ensure clean and efficient electrical power generation in grid-connected operation experiences load disturbances on regular basis. Proportional plus Integral plus Derivative (PID) controller has been introduced to simple cycle gas turbines rated from 18.2 to 106.7 MW. In addition, Fuzzy gain scheduled PID controller has been proposed and their dynamic behavior is analyzed. The simulation results in terms of time-domain parameters and error criteria reveal that the fuzzy gain scheduled PID controller yield better response during dynamic and steady-state period. Further, the stability of gas turbine is analyzed from the dynamic performance of various state variables, viz., fuel demand (Wd), valve positioner signal (Vp), fuel supply (Wf2), turbine torque developed (F2), and actual torque (Tt) which are also being analyzed in this paper. Analysis of the dynamic response also ensures that the fuzzy tuned PID controller is a suitable controller to be implemented with the latest derivative speedtronic governor control system of the HDGT power plants