Method for controlling a gap minimization of an adjustable gap between a rotor and a housing of a gas turbine, wherein the gas turbine comprises a gap-adjusting device, in particular a hydraulic gap-adjusting device, characterized by the following steps: - with the aid of a simulation program, the operation of the gas turbine with different parameter settings is modeled and a simulation data set is prepared which contains the dependence of the gap size on an operating parameter, - on the basis of the simulation data set, a lower threshold (P U) and an upper threshold (P O) for the operating parameter are specified, - furthermore, for a transition region between the lower threshold (P U) and the upper threshold (P O), a correlation between the operating parameter and a maximum value (P MAX) of the operating parameter is extracted from the simulation data set, - during operation of the gas turbine, an actual value (P I) of the operating parameter is continuously determined and compared with the lower threshold (P U) and the upper threshold (P O), - and the maximum value (P MAX) of the actual value (P I) is determined over a specified time period, wherein, in the comparison of the actual value (P I) with the lower threshold (P U) and the upper threshold (P O), if the actual value (P I): - lies below the lower threshold (P U), the gap minimization is deactivated, - lies above the upper threshold (P O), the gap minimization is activated, - lies in the transition region, a limit value (P G) for the operating parameter is determined with the aid of the maximum value (P MAX) from the specified time period using the correlation and the gap minimization is activated if the actual value (P I) lies above the limit value (P G) and is deactivated if the actual value (P I) lies below the limit value (P G). - with the aid of a simulation program, the operation of the gas turbine with different parameter settings is modeled and a simulation data set is prepared which contains the dependence of the gap size on an operating parameter, - on the basis of the simulation data set, a lower threshold (P U) and an upper threshold (P O) for the operating parameter are specified, - furthermore, for a transition region between the lower threshold (P U) and the upper threshold (P O), a correlation between the operating parameter and a maximum value (P MAX) of the operating parameter is extracted from the simulation data set, - during operation of the gas turbine, an actual value (P I) of the operating parameter is continuously determined and compared with the lower threshold (P U) and the upper threshold (P O), - and the maximum value (P MAX) of the actual value (P I) is determined over a specified time period, - lies below the lower threshold (P U), the gap minimization is deactivated, - lies above the upper threshold (P O), the gap minimization is activated, - lies in the transition region, a limit value (P G) for the operating parameter is determined with the aid of the maximum value (P MAX) from the specified time period using the correlation and the gap minimization is activated if the actual value (P I) lies above the limit value (P G) and is deactivated if the actual value (P I) lies below the limit value (P G).