  Continuous gravitational waves (GWs) of neutrons stars haven't been detected
directly until now. One possible way to indirectly identify their signatures is
via the correlation between magnetars and gamma-ray bursts (GRBs), since, under
this magnetar scenario of GRBs, GW radiation can affect the evolution of GRB
X-ray light curves. Nevertheless, relevant studies lack essential details of
this GRB magnetar scenario. For instance, the authors tend to avoid answering
the questions like why GRB X-ray light curves can record the information of
gravitational wave emissions, what are the reliable criteria for selecting
samples that can reveal GW information, and what are the limitations of this
GRB-magnetar scenario. In this paper, we elucidate these issues in detail.
