  We develop the minimal requirements for the complete entanglement
quantification of an arbitrary two-mode bipartite Gaussian state via local
measurements and a classical communication channel. The minimal set of
measurements is presented as a reconstruction protocol of local covariance
matrices and no previous knowledge of the state is required but its Gaussian
character. The protocol becomes very simple mostly when dealing with Gaussian
states transformed to its standard form, since photocounting/intensity
measurements define the whole set of entangled states. In addition, conditioned
on some prior information, the protocol is also useful for a complete global
state reconstruction.
