GLS periodograms of the (combined) photometric data and spectroscopic activity indicators from GJ 724 with peaks that reach at least a FAP level of 10% in the period range of 2 d to 200 d. The gray dashed horizontal lines correspond to the FAP levels of 0.1%, 1%, and 10% (from top to bottom, respectively). The mean rotation period of 56 d determined from the photometry is marked by the blue dashed line, while its second harmonic (P_rot / 2) of 28 d is depicted by the orange dashed line. The period of the 5.1-day planet is highlighted by the red solid line.