The gas interconnector Greece – Bulgaria (IGB project) connects the natural gas transmission network of Greece near the town of Komotini with the Bulgarian transmission network near the town of Stara Zagora. The interconnector has an overall length of 182 km and a technical capacity of 3 bcm per year with an option for increasing the transmission capacity to up to 5 bcm per year with the construction of a compressor station on Greek territory that would also allow for reverse flow. The implementation of the IGB project aims to ensure diversification not only of the routes but also of the natural gas sources for Bulgaria and the wider region. As part of the development of the Southern Gas Corridor, through IGB Bulgaria and its neighbouring countries have access to alternative supplies from the Caspian region as well as from existing or planned LNG terminals. IGB creates new market opportunities and enhances international partnerships in the region. The gas interconnector Greece – Bulgaria is recognized as a leading project for the CESEC initiative and has excellent synergy with other major projects like TAP and TANAP. The project is a game-changer for the Bulgarian energy market with its ability to increase competition and decrease the prices for consumers while securing diversified gas deliveries. IGB is being developed in great synergy with the LNG terminal near the Greek city of Alexandroupolis, which is set for completion in 2024. With the terminal’s implementation, IGB’s capacity may see a significant boost of up to 5 bcm/y, which will further ensure independent energy deliveries in the region.