GAC is the global accrediting authority for project, program, and portfolio management and related degree programs.
GAC accreditation confirms that an institution’s project management degree program has been carefully assessed and that its scale, scope, and quality meet comprehensive, global standards for accreditation. It also makes a public statement about the deep commitment of the institution and its faculty to ongoing evaluation and continuous quality improvement.
GAC accreditation delivers a wide range of benefits to academic institutions and their students.
https://pmiteach.org/enriching-programs/#gac
From pmiteach website