Si Gilberto Eduardo Gerardo "Gilbert"/"Gibô" Cojuangco Teodoro Jr. (ipinanganak Hunyo 14, 1964) ay ang dating kalihim ng Kagawaran ng Tanggulang Pambansa ng Pilipinas. Siya ay nagsimulang maglingkod bilang kalihim noong Agosto 2007 at nagbitiw noong Nobyembre 2009. Siya ay naihahalal na kasapi ng Kapulungan ng mga Kinatawan ng Pilipinas mula 1998 hanggang 2007, na kumakatawan sa Unang Distrito ng lalawigan ng Tarlac. Marso nang taong 2009 nang ipahayag niya ang pagnanais na tumakbo sa pagka-Pangulo ng Pilipinas sa darating na Halalan sa Mayo 2010.
Siya ang nag-iisang anak nang dating tagapamahala ng Paseguruhan ng mga Manggagawa sa Pribadong Sektor Gilberto Teodoro, Sr. at dating kasapi ng Batasang Pambansa Mercedes Cojuangco-Teodoro. Pamangkin din siya ni Eduardo Cojuangco, Jr., tagapangulo ng San Miguel Corporation.
Bukod sa pagiging kasapi ng Integrated Bar of the Philippines, UP Alumni Association, UP Law Alumni Association, Harvard Alumni Association at Harvard Law Alumni Association, lisensyadong piloto din si Teodoro at Colonel sa Reserba ng Hukbong Himpapawid ng Pilipinas.
Gilberto Eduardo Gerardo Cojuangco Teodoro, Jr. (born on June 14, 1964 in Isabela, Philippines), or more commonly known as Gilbert/Gibo, is the former secretary of the national defense of the republic of the Philippines, having assumed the post in August 2007 until November 15, 2009. He was a member of the House of Representatives, representing the First District of Tarlac province, from 1998 to 2007. In March 2009, he announced his intention to run for President of the Philippines in the May 2010 elections. He is also known for his efforts as the Chairman of the National Disaster Coordinating Council (NDCC) when Mega Manila was hit by Typhoon Ketsana (Ondoy).
At the age of 16, in 1980, Teodoro was elected as the Kabataang Barangay (KB) President in Tarlac. He went on to lead Central Luzon and became a member of the Tarlac Sangguniang Panlalawigan at the time that his mother was the Tarlac representative in the National Assembly.
From 1998 to 2007 he was a House Representative for the First District of Tarlac province. He assumed the position of Assistant Majority Leader in the 11th Congress and head of the Nationalist People's Coalition House members. He was also a member of the House contingent to the Legislative-Executive Development Advisory Council.
Teodoro was a part of the "Bright Boys" clique.
Teodoro was appointed Secretary of the Department of National Defense in August 2007 at the age of 43, like the late Ramon Magsaysay, he is also the youngest person to ever hold the position. While serving as the Secretary of the Department of National Defense, Teodoro concurrently headed the National Disaster Coordinating Council (NDCC).
In March 2009, Teodoro announced his intention to run for President of the Philippines in the May 2010 election. Months earlier, he quit his old party Nationalist People's Coalition (NPC) to join the merged administration party Lakas Kampi CMD and cast his name in the ruling party's contenders for the 2010 elections.
On May 11, 2010, a day after the elections were held, Teodoro gracefully conceded defeat to the leading Presidential candidate, Senator Noynoy Aquino of the Liberal Party. During a press conference he held in the L akas-KAMPI-CMD national headquarters in Metro Manila, Teodoro wished Aquino well and also announced his decision to return to private life in order to take care of his wife and only son.