In 2013, Gadia played for the Philippine national under-19 team at the 2013 AFF U-19 Youth Championship and the 2014 AFC U-19 Championship qualifiers. He is credited for the last minute goal against Laos in the AFC qualifiers which prevented the national team from ending at the bottom of their group.
By 2014, Gadia had already have experience playing for Pachanga Diliman at the UFL Cup. In May 2016, Gadia made his league debut at the United Football League for the Loyola Meralco Sparks in a match against Global
Gadia debuted for the Philippine national football team in a friendly match against Australian club Perth Glory FC in July 2016. However, his first official international cap was made about two months later in October 8, 2016 when he came in as substitute in the 82nd minute for Phil Younghusband in a friendly match against Bahrain. The match ended in a 1–3 defeat.
The club then joined the Philippines Football League and changed their name to FC Meralco Manila. They played in the inaugural season in 2017 before it was dissolved in January 2018 which left Gadia club-less.
