This article analyses the mainstreaming implementation of Gender and Development (GAD) in barangay governance. With this, it addresses gender and development problems to mainstream GAD policy by acknowledging the role of the government, especially its leadership, in the delivery of GAD services and the involvement of the civil society. This study uses the descriptive method of research to describe the demographic profile of the respondents, their level of knowledge and level of implementation of the Women in Development and Nation Building Act or, otherwise known as, RA 7192. The respondents of this study were the barangay councils and their respective officials from the Barangay's Local Government Unit (LGU) of Cagayan de Oro. Thirty (30) Barangays were drawn at random and 240 barangay officials served as respondents. Data analyses were achieved using simple descriptive statistics, as well as the application of regression analys