The Agreement on Government Procurement signed at Marrakesh on 15 April 1994, as amended from time to time.
ystyr y 'Cytundeb ar Gaffael gan Lywodraethau' ('y GPA') yw’r Cytundeb ar Gaffael gan Lywodraethau a lofnodwyd ym Marrakesh ar 15 Ebrill 1994, fel y'i diwygiwyd o bryd i'w gilydd.