GNLA leader Kakam D Shira told reporters over telephone that the group will impose the bandh from October 10 to 14 and from October 17 to 21.
He said the outfit will not withdraw the bandh call unless the government stops operations against their cadre.
Chief Minister Mukul Sangma said the government would not buckle under the pressure tactics of the outfit and full force would be used to neutralise the militant group.
"The purpose of the bandh is to pressure the government to stop the operations. But the government will not bow down to the pressure," Sangma told a TV channel.
He said, "The people should understand the intention of the outfit which is indulging in extortion, killings and kidnappings."