The report’s release is part of Biden’s policy to realign ties with Riyadh after years of giving the Arab ally and major oil producer a pass on its human rights record and its intervention in Yemen’s civil war.
Saudi Crown Prince Mohammed bin Salman announced earlier a plan to make Riyadh one of the world's biggest 10 cities under his economic reform plan to diversify the kingdom's oil-dependent economy.
But the following year, the fallout over journalist Jamal Khashoggi's murder by Saudi agents in Istanbul prompted a wave of business and political leaders to pull out of the glitzy conference at the last minute.
Leaders of the six-member Gulf Cooperation Council signed two documents, the Al-Ula declaration, named after the Saudi city where the summit was held, and a final communique.
Those countries will meet in the Saudi city of Al-Ula, after Riyadh overnight re-opened its borders to Doha despite lingering enmity between the neighbours.
The ruling does not order the disclosure of the documents but the Open Society Justice Initiative described the order as a "crucial victory in addressing the Trump administration's shameful cover-up" of the murder.