In previous papers, we have discussed the calculation of model atmospheres for metal-deficient and solar-abundance giant stars and have presented a grid of such models. We have now carried out synthetic spectrum calculations at a resolution of 0.1 Å between 3000 and 7200 Å for most of the models of this grid. We have also computed synthetic spectra at wavelengths up to 12000 Å for some of the grid models. The calculations allow for the presence of thousands of atomic and molecular lines. Examples of these spectra are shown in this paper.