Courses Taught
Representative Publications

Research Interests:
Environmental law
Law and politics
Judicial Politics
Constitutional amendments
Constitutional law

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

Professor of Law


Professor Gatmaytan 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.

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’s books include Legal Method Essentials, Local Government Law and Jurisprudence, and Constitutional Law in the Philippines: Government Structure (published by Lexis-Nexis in 2015). His scholarship is collected in More Equal than Others: Constitutional Law and Politics, and Underclass: Public Interest Law Practice Perspectives.

He served as the Head of the Information and Publication Division of the UP Law Center from 2013-2018.




LLB, University of the Philippines, 1991
MSEL, Vermont Law School, 1995
LLM, University of California, Los Angeles, 1996