Executive Order 14057, Catalyzing Clean Energy Industries and Jobs Through Federal Sustainability (December 8, 2021) and the Federal Acquisition Regulation (FAR) Part 23 - Environment, Energy and Water Efficiency, Renewable Energy Technologies, Occupational Safety, and Drug-Free Workplace, last revised in 2021 constitute the US legal framework on GPP.
GPP is mentioned in national commitments on climate change: Executive Order 14057, Catalyzing Clean Energy Industries and Jobs Through Federal Sustainability (December 8, 2021).
Regarding co-ordination between environmental and GPP national commitments: Staff from the White House Council on Environmental Quality, Environmental Protection Agency, and other offices advise in the promulgation of sustainable acquisition regulations. The institution in charge of ensuring co-ordination is the Executive Office of the President.