Guantanamo Bay Detention Facility Safe Closure Act of 2009 - Directs the President to notify the congressional defense and appropriations committees at least 90 days before taking any action associated with the closure of the Department of Defense (DOD) detention facility at Guantanamo Bay, Cuba, and the transfer of any persons detained there to a new detention facility in the United States.
Requires the notification to include a: (1) study addressing the legal ramifications and the security, infrastructure, and other support requirements associated with such closure and transfer of persons detained; and (2) plan for the relocation of the persons detained.