A system comprising: a fuel supply system comprising: a fuel pump comprising an inlet and an outlet; a first fuel feeding valve configured to control a first flow of a first liquid fuel to the inlet based at least in part on first feeding valve control signals; a second fuel feeding valve configured to control a second flow of a second liquid fuel to the inlet based at least in part on second feeding valve control signals; a motor coupled to the fuel pump, wherein the motor comprises a variable frequency drive device configured to drive the motor, wherein the motor is configured to drive the fuel pump based at least in part on pump speed control signals; a main fuel control valve configured to regulate fuel flow to fuel manifolds/nozzles of a gas turbine system based at least in part on main fuel valve control signals, wherein the main fuel valve control signals are based at least in part on load demands of the gas turbine system; and a controller coupled to the motor, the first fuel feeding valve, the second fuel feeding valve and the main fuel control valve, wherein the controller is configured to generate the first feeding valve control signals, the second feeding valve control signals, the pump speed control signals, and the main fuel control valve signals based at least in part on first fuel parameters of the first liquid fuel and second fuel parameters of the second liquid fuel, wherein the controller is configured to control a transition from the first flow to the inlet at a first time to a second flow to the inlet at a second time; wherein the system further comprises a pump discharge pressure sensor coupled to the outlet of the fuel pump, wherein the pump discharge pressure sensor is configured to provide feedback of a discharge pressure to the controller, and the controller is configured to generate the first feeding valve control signals, the second feeding valve control signals, and the pump speed control signals during the transition based at least in part on the feedback of the discharge pressure from the pump discharge pressure sensor. a fuel pump comprising an inlet and an outlet; a first fuel feeding valve configured to control a first flow of a first liquid fuel to the inlet based at least in part on first feeding valve control signals; a second fuel feeding valve configured to control a second flow of a second liquid fuel to the inlet based at least in part on second feeding valve control signals; a motor coupled to the fuel pump, wherein the motor comprises a variable frequency drive device configured to drive the motor, wherein the motor is configured to drive the fuel pump based at least in part on pump speed control signals; a main fuel control valve configured to regulate fuel flow to fuel manifolds/nozzles of a gas turbine system based at least in part on main fuel valve control signals, wherein the main fuel valve control signals are based at least in part on load demands of the gas turbine system; and a controller coupled to the motor, the first fuel feeding valve, the second fuel feeding valve and the main fuel control valve, wherein the controller is configured to generate the first feeding valve control signals, the second feeding valve control signals, the pump speed control signals, and the main fuel control valve signals based at least in part on first fuel parameters of the first liquid fuel and second fuel parameters of the second liquid fuel, wherein the controller is configured to control a transition from the first flow to the inlet at a first time to a second flow to the inlet at a second time; wherein the system further comprises a pump discharge pressure sensor coupled to the outlet of the fuel pump, wherein the pump discharge pressure sensor is configured to provide feedback of a discharge pressure to the controller, and the controller is configured to generate the first feeding valve control signals, the second feeding valve control signals, and the pump speed control signals during the transition based at least in part on the feedback of the discharge pressure from the pump discharge pressure sensor.