Garrett Lee Smith Memorial Reauthorization Act This bill reauthorizes through FY2027 multiple suicide prevention programs and related activities with a particular focus on youth and young adults. Specifically, the bill reauthorizes grants for statewide or tribal youth suicide prevention and early intervention strategies and for mental health and substance use disorder services for college students, a working group tasked with developing a plan to carry out a public education campaign concerning access to and reducing stigma associated with mental health services at institutions of higher education, and a suicide prevention resource center that provides training and other resources regarding suicide prevention among all ages.