The kgwt is defined as the when 1 kg of mass is given an acceleration(g) it produces a force called kgwt.
the gram wt is defined as when 1gram of mass is given the acceleration(g) it produces a force called gmwt
​actually both are types of force which has been used in different situation like kgwt is S.I unit of force and gmwt is C.G.S unit.