Courses Taught
Representative Publications

Research Interests:

Environmental law

Law and politics

Judicial Politics

Constitutional amendments

Constitutional law

Office: 216 Malcolm Hall
College of Law, University of the Philippines, Diliman, Quezon City 1101
920-5514 loc. 403



Professor Gatmaytan is Professor of Law in the U.P. College of Law where he teaches Constitutional Law, Legal Method, and Local Government Law.  Before he entered the academe in 1998, he practiced law through public interest law offices working with rural poor communities involved in environment and natural resources law, indigenous peoples’ rights, agrarian reform, and local governance.

He graduated with a Bachelor’s Degree from the Ateneo de Manila (B.S. Legal Management) in 1987 and a law degree (LL.B.) from the University of the Philippines in 1991.  He holds Masters Degrees from Vermont Law School (cum laude) and the University of California, Los Angeles.

He is a professorial lecturer and vice-chair of the Department of Legal Method and Research at the Philippine Judicial Academy.

Professor Gatmaytan writes on a wide range of issues which include the environment, gender, the judiciary, and the intersection of law and politics.  His works have appeared in the Asian Journal of Comparative Law, the Oregon Review of International Law, the UCLA Pacific Basin Law Journal, the Georgetown International Environmental Law Review, and the Harvard Women’s Law Journal among others.

His primary research interests are concentrated on constitutional amendments, the interaction of law and politics, and comparative constitutionalism.


Professor Gatmaytan published Legal Method Essentials 2.0 and Local Government Law and Jurisprudence both in 2014.



BS, Ateneo De Manila University, 1987
LLB, University of the Philippines, 1991
MSEL, Vermont Law School, 1995
LLM, University of California, Los Angeles, 1996

University of the Philippines, College of Law, Diliman, Quezon City Trunkline: 920-5514
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