The rapid aging of Taiwan's population has brought about serious economic and social problems. Meeting the health care needs of the elderly in particular has become an urgent issue in light of the alarming increase in and the complicated health conditions of the aging population, and gerontological advanced practice nursing (APN) plays a crucial role in responding to this urgent issue. However, in spite of the vigorous development of nursing education in Taiwan, there is no system dedicated to training gerontological advanced practice nurses, whose presence is nowhere in sight in current clinical setting. The experiences of developing training systems for gerontological advanced practice nurses in Japan and the United States may be worth emulating with differences between Taiwan and the two countries in terms of culture, society, health policy, and health insurance system taken into careful consideration. Based on the theory of role development and consulting the experiences of Japan and the United States, this paper strives to explore the roles and functions of gerontological advanced practice nurses and provide suggestions for the development of a gerontological APN training system befitting Taiwan.