  We extend the equation of state of GCG (Generalized Chaplygin Gas) to $w<-1$
regime and show, from the point of view of dynamics, that the parameters of GCG
should be in the range of $0<\alpha<1$. Also, dynamical analysis indicate that
the phase $w_{g}=-1$ is a dynamical attractor and the equation of state of GCG
approaches it from either $w_{g}>-1$ or $w_{g}<-1$ depending on the choice of
its initial cosmic density parameter and the ratio of pressure to critical
energy density.
