G-Tower, Modern skyscraper in Songdo district, Incheon, South Korea.

G-Tower is a 33-floor, 150-metre tower inside Central Park in Songdo International City, Yeonsu-gu, Incheon. Completed in 2013, it houses the offices of the Green Climate Fund and other UN-related environmental bodies, along with the Incheon Free Economic Zone Authority. A sky garden on the 29th floor opens 180 degrees onto Songdo Central Park, the Incheon Bridge and the Yellow Sea.

The building was completed in 2013 and marked an important phase in the development of Songdo International Business District. Its construction was part of transforming the area into a global business hub.

The building houses multiple United Nations offices and serves as a meeting point for international professionals from around the globe. People from different countries work here together, using the spaces for worldwide collaboration.

The 33rd-floor IFEZ observation deck is open to the public and looks over Songdo International City and the Incheon Free Economic Zone; it closed temporarily in 2020 because of COVID-19. On the 29th floor, the Sky Garden terrace opens 180 degrees toward Songdo Central Park, the Incheon Bridge and the Yellow Sea. Offices fill most of the tower, with banks, restaurants and a post office on the lower levels.

The building serves as headquarters for several international organizations, making Incheon a place of worldwide importance. This role as an international administrative center sets it apart from other skyscrapers in the region.