GAIL with 70% equity participation is the lead promotor of BPCL(Brahmaputra Cracker and Polymer Limited),a Joint Venture Company between GAIL, Government of Assam, OIL(Oil India Limited) and NRL(Numaligarh Refinery Limited).

GAIL has promoted Joint Venture Companies in Delhi, Mumbai, Hyderabad, Kanpur, Agra, Lucknow, Bhopal, and Pune, for supplying Piped Natural Gas (PNG) to households and commercial users, and Compressed Natural Gas (CNG) to the transport sector

GAIL has a participating stake in the Dahej Terminal and the upcoming Kochi Terminal in Kerala

GAIL has a participating interest in TNGCL, Tripura

GAIL has an equity stake in GSEG Power Plant, Gujarat

GAIL's Joint Venture with NTPC, Ratnagiri Gas & Power Pvt. Limited (RGGPL), seeks to revive the LNG terminal at Dabhol Power Project with an equity infusion of Rs.500 crores