  Action of the graded Grothendieck-Teichmueller (GT) group on a resolution of
the operad of Gerstenhaber algebras (GA) is defined. It is shown that the
induced Lie algebra action is homotopically non-trivial (i.e. the induced map
from the Lie algebra of the graded GT group to the deformation complex of the
operad of GA is injective).
