In recent years, there has been growing interest and significant progress in the study of high-frequency gravitational waves (HFGWs) within both theoretical and experimental realms. Of particular significance is the potential for electromagnetic signals induced by gravitational waves in the presence of background electromagnetic fields, highlighting promising synergies between axion experiments and gravitational wave detection in the high-frequency regime, beyond the reach of LIGO. In this talk, I will provide an overview of the opportunities and challenges in advancing the HFGW program and present illustrative examples of potential HFGW searches, including the use of axion haloscopes and various astrophysical sources, such as pulsars.