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In this paper, we report an efficient cooperative energy transfer in Gd2(MoO4)3:Tb3+,Yb3+ nanophosphors. Powder samples of Gd2(MoO4)3:Tb3+,Yb3+ were prepared by means of combustion synthesis. The products were analyzed by means of X-ray diffraction, scanning electron microscopy and fluorescence spectrometer. The dependence of Yb3+ concentration on the visible- and NIR-emission, decay lifetime and quantum efficiency from the Gd2(MoO4)3:Tb3+,Yb3+ phosphors have been investigated. The optimal quantum efficiency has been found to be 185%. Our results show that in principle an efficiency luminescent converter that, in an ideal case, converts visible photons into two or more NIR photons.