  We have solved cosmological gravitational Wave(GW)equation in the frame work
of Generalised Brans-Dicke(GBD) theory for all epochs of the Universe.The
solutions are expressed in terms of the present value of the Brans-Dicke
coupling parameter $\omega(\phi)$.It is seen that the solutions represent
travelling growing modes for negative values of $\omega_{0}$ for all epochs of
the Universe.
