He won re-election as representative of the new 2nd district of the newly chartered city of Valenzuela in 2001.

9048 (also known as Gunigundo Law)[3] that authorizes the correction of clerical errors in birth certificates and other civil registry documents without the need of judicial order.

He is also the driving force in the adoption of the principles and framework of the Mother Tongue- Based Multilingual Education (MTBMLE) as a key component of Republic Act o.

Effective June 1, 2013, all government offices and media networks are now required to use Philippine Standard Time as a basis in set ting their timepieces.

In 2013, he narrowly defeated Councilor Shalani Soledad-Romulo for the congressional seat of the 2nd district of Valenzuela City.

Gunigundo attempted a comeback to the Congress in 2019 and in 2022 but was unsuccessful in both instances to his successor, Eric Martinez.