Purpose:This study explores the contributions and effectiveness of the Jockey Club "Giftedness into Flourishing Talents" Project (Project GIFT) in supporting learner diversity in gifted education, including meeting the educational and psychological needs of highly capable and gifted students in Hong Kong.Design/Approach/Methods:This study investigates the effectiveness of Project GIFT in supporting the development of diversity in learning in 20 project schools. Through close cooperation with project schools, Project GIFT comprised six developmental areas: school development, curriculum development, teachers' professional development, parent empowerment, student development, and financial support. To further assess the usefulness of the school-based support provided by Project GIFT, this study examines the implementation of school-based gifted education in two project schools based on the aforementioned components.Findings:This study reveals Project GIFT's significant role in promoting school-based gifted education in Hong Kong schools. Indeed, it was the first cross-institutional and research-based educational program in gifted education that intervened at both Level 1 (whole class) and Level 2 (pullout) of the three-tiered policy stipulated by the Hong Kong Education Bureau. One of the few gifted education programs implemented in Asia, Project GIFT focused on six key components to specifically support high-ability and gifted students with diverse educational and affective needs. This study shows that Project GIFT significantly enhanced diversity in learning, its collaboration with two key schools resulting in the successful enhancement of school development, professional development, curriculum development, student development, parent empowerment, and financial support.Originality/Value:The article fills the research gap by examining the effectiveness of a school-based gifted education program focused on enriching and differentiating curricula for different regular