A system for tuning a gas turbine, comprising: a first gas turbine; a second gas turbine; a first turbine controller operatively coupled to the first gas turbine; a second turbine controller operatively coupled to the second gas turbine; a first computer system operatively coupled to the first turbine controller; a second computer system operatively coupled to the second turbine controller; a third computer system for exchanging data with the first and second computer systems, the third computer system being located remotely from the first and second turbines (200, 300); and characterized in that the first computer system being adapted for transmitting data relating to combustion dynamics and/or emissions of the first gas turbine to the third computer system over the network connection, and for processing control data received over the network connection in response to the transmitted data relating to the combustion dynamics and/or emissions of the first gas turbine to enable the first turbine controller to tune fuel split settings of the first gas turbine; the second computer system being adapted for transmitting data relating to combustion dynamics and/or emissions of the second gas turbine to the third computer system over the network connection, and for processing control data received over the network connection in response to the transmitted data relating to the combustion dynamics and/or emissions of the second gas turbine to enable the second turbine controller to tune fuel split settings of the second gas turbine. the third computer system arranged to receive user input in response to the data transmitted from the first and second computer systems and to transmit the control data reflecting the received user input to the first and second computer systems; wherein the first and second gas turbines (200, 300) are located remotely from each other; and the network connection is an internet, intranet or virtual private network. a first gas turbine; a second gas turbine; a first turbine controller operatively coupled to the first gas turbine; a second turbine controller operatively coupled to the second gas turbine; a first computer system operatively coupled to the first turbine controller; a second computer system operatively coupled to the second turbine controller; a third computer system for exchanging data with the first and second computer systems, the third computer system being located remotely from the first and second turbines (200, 300); and characterized in that the first computer system being adapted for transmitting data relating to combustion dynamics and/or emissions of the first gas turbine to the third computer system over the network connection, and for processing control data received over the network connection in response to the transmitted data relating to the combustion dynamics and/or emissions of the first gas turbine to enable the first turbine controller to tune fuel split settings of the first gas turbine; the second computer system being adapted for transmitting data relating to combustion dynamics and/or emissions of the second gas turbine to the third computer system over the network connection, and for processing control data received over the network connection in response to the transmitted data relating to the combustion dynamics and/or emissions of the second gas turbine to enable the second turbine controller to tune fuel split settings of the second gas turbine. the third computer system arranged to receive user input in response to the data transmitted from the first and second computer systems and to transmit the control data reflecting the received user input to the first and second computer systems; wherein the first and second gas turbines (200, 300) are located remotely from each other; and the network connection is an internet, intranet or virtual private network.