The Indian Space Research Organisation's (ISRO) Geosynchronous Satellite Launch Vehicle (GSLV) is an expendable launch vehicle (ISRO). From 2001 until 2021, the GSLV was utilized in fourteen launches, with more planned. Despite the fact that the GSLV Mark III has the same name, it is a completely different launch vehicle.

The Geosynchronous Satellite Launch Vehicle (GSLV)project began in 1990 with the goal of giving India a geosynchronous satellite launch capability.

The S125/S139 solid rocket booster and the liquid-fueled Vikas engine are used in the GSLV. They have already proven themselves in the Polar Satellite Launch Vehicle (PSLV) launch vehicles. The third stage was to be powered by a LOX/LH2cryogenic engine, which India did not have or have the technical know-how to develop at the time due to the thrust required to put the satellite into a geostationary transfer orbit (GTO).

The GSLVcan launch 5,000 kilograms (11,000 lb) into an easterly low Earth orbit (LEO) or 2,500 kg (5,500 lb) into an 18° geostationary transfer orbit (for the Mk II variant).

The GSLV family of rockets has made 14 launches as of August 12, 2021, with eight successes, four failures, and two partial failures. All launches have taken place at the Satish Dhawan Space Centre, which was previously known as the Sriharikota Range (SHAR).