G-Valley (Seoul Digital National Industrial Complex) began as the Guro Industrial Complex in the 1960s centered on light industries such as textiles and sewing, and grew to account for 10% of the country's total exports in the 1970s. Since the end of the 1990s, G-Valley has transformed into a new industrial complex specializing in R&D and IT by shifting the focus to high-tech industries.

Spanning 1.92 million square meters across Guro-gu (Phase 1) and Geumcheon-gu (Phases 2 and 3), G-Valley is currently home to about 13,000 companies, leading the development of ICT industries such as information and communication, e-commerce, and software. It also houses the largest number of IT ventures in Korea, with small businesses accounting for more than 95%. The output value per unit area is KRW 7.5 million, which is 6.3 times higher than the average of Korea's national industrial complexes (standing at KRW 1.2 million). G-Valley also stands out as the nation's biggest knowledge industry cluster, as it houses more than 40% of Seoul's knowledge industry centers. It is also expected to emerge as a center of ICT convergence industries, as attempts are being made to create new industries by enabling mini-clusters (MCs) to expand the base of convergence industries, such as digital content, smart information technology (SIT), and design IT convergence technology.

In 2021, the G-Tower, with 39 above-ground and seven underground floors, was built in 2021 to serve as a landmark of the G-Valley. It will attract regionally-specialized industries such as gaming and contents, and provide about 7,000 jobs. It is also growing as a content industry hub by hosting gaming academies and R&D commercialization centers, and the G-Valley Industry Museum and a convention center have been opened to complement the infrastructure..