Examining Opioid Treatment Infrastructure Act of 2019 This bill requires the Government Accountability Office to report on inpatient and outpatient treatment capacity, availability, and needs across the United States. The report must include information relating to detoxification programs, clinical stabilization programs, transitional residential support services, rehabilitation programs, treatment programs for pregnant women or adolescents, and treatment through Indian health programs. The report must also include information about the barriers to real-time reporting of drug overdoses at the federal, state, and local levels and ways to overcome those barriers.