Nuclear forward scattering (NFS) of synchrotron radiation (SR) is theoretically modeled into multilevel "gamma-optical" paramagnetic media with effective integer spin (S=1, 2) under the electron spin fluctuations in the unclosed electron shell of Moessbauer ion 57Fe 4+(2+). The equilibrium fluctuations of effective spin is changing the time phase coherence within the total resonant forward scattering amplitude of a gamma-quantum of SR pulse into the Moessbauer nuclei ensemble of a sample. As result the specific temperature dependence of the resonant response of "gamma-optical" paramagnetic medium takes place
