The comfort level of a gear shift in a motor vehicle with an automated gear-shifting transmission is determined by shift parameters which are dependent on driving parameters and on a shift program mode that is either driver-selected or automatically determined. The shift program mode is identified through a characteristic parameter which can vary in a range of parameter values corresponding to a range of shift program modes. The method has the steps of: detecting current values of the driving parameters; detecting a current value of the characteristic parameter; determining respective minimum and maximum values that each of said shift parameters can assume within the range of characteristic parameter values as a function of the current driving parameter values; calculating actual shift parameter values as intermediate values between said maximum and minimum values for each of said shift parameters based on said current value of the characteristic parameter; and performing the gear shift with the actual shift parameter values.