A gas sensor system includes a gas sensing element that includes a gas sensing material and electrodes configured to apply electrical stimuli to the gas sensing material and one or more processors configured to control the gas sensing element. The one or more processors are configured to direct the electrodes to apply the electrical stimuli at two or more different electrical excitation frequencies to the gas sensing material. A first electrical excitation frequency of the two or more different electrical excitation frequencies is configured to provide a quantitative gas response of the gas sensing material, the quantitative gas response including a response drift. A second electrical excitation frequency of the two or more different electrical excitation frequencies is configured to provide a baseline response of the gas sensing material based at least in part on the response drift.