A control system for a gas engine comprising: an exhaust gas temperature detector for detecting exhaust gas temperatures of a plurality of cylinders in the gas engine; fuel feed devices (14, 18) respectively corresponding to the plurality of cylinders; a controller for driving the fuel feed devices; and a knocking detector coupled to an engine phase angle detector and to a cylinder internal pressure sensor, and configured to determine for each of said cylinders whether misfire has occurred therein; the controller being configured to execute load equalization control in every period of a predetermined cycle number such that an average value (T AVE) of exhaust gas temperatures of the cylinders, which are the controlled targets, is calculated and that a fuel feed amount corresponding to a higher-temperature cylinder of a first predetermined number, which is selected to include the cylinder with the highest exhaust gas temperature, among cylinders which are controlled targets, is reduced based on the deviation between the exhaust gas temperature of said higher-temperature cylinder and the average value, and a fuel feed amount corresponding to a lower-temperature cylinder of a second predetermined number, which is selected to include the cylinder with the lowest exhaust gas temperature, among the cylinders which are the controlled targets, is increased based on the deviation between the average value and the exhaust gas temperature of the lower-temperature cylinder, wherein the sum of the first and second predetermined numbers is less than the number of cylinders so that there is at least a cylinder whose fuel amount is not changed, wherein the controller is configured to execute fuel stop control for stopping fuel feeding to a cylinder in which misfire has occurred, for a predetermined period, concurrently with the load equalization control, and wherein a cylinder which is a controlled target in the fuel stop control is excluded from the candidates of the cylinders which are the controlled targets in the load equalization control. an exhaust gas temperature detector for detecting exhaust gas temperatures of a plurality of cylinders in the gas engine; fuel feed devices (14, 18) respectively corresponding to the plurality of cylinders; a controller for driving the fuel feed devices; and a knocking detector coupled to an engine phase angle detector and to a cylinder internal pressure sensor, and configured to determine for each of said cylinders whether misfire has occurred therein; the controller being configured to execute load equalization control in every period of a predetermined cycle number such that an average value (T AVE) of exhaust gas temperatures of the cylinders, which are the controlled targets, is calculated and that a fuel feed amount corresponding to a higher-temperature cylinder of a first predetermined number, which is selected to include the cylinder with the highest exhaust gas temperature, among cylinders which are controlled targets, is reduced based on the deviation between the exhaust gas temperature of said higher-temperature cylinder and the average value, and a fuel feed amount corresponding to a lower-temperature cylinder of a second predetermined number, which is selected to include the cylinder with the lowest exhaust gas temperature, among the cylinders which are the controlled targets, is increased based on the deviation between the average value and the exhaust gas temperature of the lower-temperature cylinder, wherein the sum of the first and second predetermined numbers is less than the number of cylinders so that there is at least a cylinder whose fuel amount is not changed, wherein the controller is configured to execute fuel stop control for stopping fuel feeding to a cylinder in which misfire has occurred, for a predetermined period, concurrently with the load equalization control, and wherein a cylinder which is a controlled target in the fuel stop control is excluded from the candidates of the cylinders which are the controlled targets in the load equalization control.