In this paper we describe a methodology to be used for the automated analysis of the spectroscopic contents of the GAUDI archive. We perform chi-square minimisation in the 5000-5200 Å spectral window to infer the atmospheric parameters and their random internal uncertainties. Effective temperatures are anchored using a zero-point correction into the scale defined by the method described in Ribas et al. (2003). Surface gravities and metallicities were put in the scale defined by nearby stars included in the S^{4}N archive. Comparison with the Elodie.3 stellar library has shown excellent agreement. Our final goal is to build a VO application, available from the Spanish Virtual Observatory (SVO, http://svo.laeff.inta.es), to derive physical parameters of large samples of stellar objects in an automated and uniform way.