The Full Form of PGDA is Postgraduate diploma.

A postgraduate diploma (PgD, PgDip, PGDip, PG Dip., PGD, Dipl. PG, PDE) is a postgraduate qualification awarded after a university degree, which supplements the original degree and awards them with a graduate diploma. Countries that award postgraduate diplomas include but are not limited to Bangladesh, Barbados, Belgium, Brazil, Canada, Chile, Colombia, Germany, Hong Kong, Jamaica, Spain, Kenya, South Africa, India, Ireland, the Netherlands, New Zealand, Nigeria, Republic of Panama the Philippines, Portugal, Russia, Pakistan, Poland, Saudi Arabia, Singapore, Sweden, the United Kingdom, Sri Lanka, Trinidad and Tobago and Zimbabwe. Level of education and recognition differ per issuing country.