The Gambling Addiction, Recovery, Investment, and Treatment Act would direct federal funding toward addressing gambling addiction through grants and research. The legislation authorizes the Assistant Secretary for Mental Health and Substance Use to distribute formula grants to states based on their existing substance abuse prevention and treatment funding levels, and allows the National Institute on Drug Abuse to support gambling addiction research. Funding would be drawn from federal gambling taxes, with 37.5 percent of annual gambling tax revenues going to state grants and 12.5 percent supporting research activities, covering fiscal years 2023 through 2032. The bill requires the Secretary of Health and Human Services to report to Congress within three years on how effective these programs have been. This legislation would primarily affect states implementing gambling addiction treatment programs and researchers studying the condition, while states failing to apply for grants would see their allocated funds redistributed to participating states.