This paper reports on the results of investigations into the temperature and orientation dependences of the electron paramagnetic resonance spectrum in the vicinity of accidental coincidence of the spectral lines attributed to the signals (homogeneously broadened or with an antisymmetric arrangement of the spin packets) from Cu2+ and Gd3+ impurity centers in the ferroelectric lead germanate Pb5Ge3O11. The parameters of the broadening and coupling of the spectral components are determined using computer simulation of the electron paramagnetic resonance spectra involving coupling (exchanging) components. © Pleiades Publishing, Inc., 2006.