A comparison of the electron paramagnetic resonance spectra obtained in fast neutron‐ and electron‐irradiated GaAs crystals has confirmed the simultaneous presence of the quadruplet and singlet spectra, ascribed previously to As4+Gaand V2−Gacenters. Only in electron‐irradiated material, however, are both signals separated by the selective microwave power saturation of the quadruplet. This apparent disparity is ascribed to a difference in the coupling between the two partners in the As4+Ga‐V2−Gaassociated complexes.