Code.org is a leading non-profit organization providing professional learning (PL) for K-12 teachers across the United States to advance computer science (CS) education. While PL is known to improve teaching practices and student outcomes in general education, CS, and gifted education, limited research has specifically examined how CS-focused PL influences teachers working with gifted students (GT). This study aimed to assess the effects of CS-focused PL on teachers' self-efficacy and classroom practices, particularly in supporting high-ability learners. We collected data through teacher surveys, classroom observations, and focus group interviews. Results showed notable increases in teacher self-efficacy, although classroom practices demonstrated variability. The study discusses potential modifications to the PL framework to enhance classroom implementation and better meet the needs of gifted students. These findings have important implications for sustaining improved instructional practices and effectively challenging GT students in CS education.