The short review of GRB studies performed for many years by Ioffe Institute is presented.An important breakthrough in GRB studies became possible owing to four Konus experimentscarried out by the Ioffe Institute onboard the Venera 11 to 14 interplanetary missionsfrom 1978 to 1983. The joint Russian-American Konus-Wind experiment, which has alreadybeen operating for more than 18 years, provides important and often unique data regardingGRB characteristics in 20 keV – 15 MeV energy range. These investigations werecomplemented by several Konus and Helicon experiments onboard Russian near-Earthspacecraft. A short description of future Konus-UF and Konus-M experiments are alsogiven.