Participants in the plurilateral Agreement on Government Procurement (GPA) affirmed at a ministerial meeting during the WTO’s Ninth Ministerial Conference their shared objective of bringing a revised version of the Agreement into force as soon as possible, and in any event no later than 31 March 2014. The revised Agreement, adopted in March 2012, modernizes the Agreement’s text and includes a significant extension of related market access commitments. The resulting gains in market access for the parties’ businesses have been estimated by the WTO Secretariat as in the range of US$ 80 billion to US$ 100 billion annually.
You can read more here