Here I present a chemical study of both globular clusters and stellar component for a range of early-type galaxies. From the joint analysis of the two tracers together it is possible to retrieve new information about galaxy formation. Using the near-IR CaT II absorption lines, we are able to directly probe the metallicity of the galaxy stars and globular clusters. Furthermore, I will show radial metallicity gradients up to several effective radii, reaching regions of the galaxies hardly explored in the past, despite their dramatic importance in revealing the formation history of these objects.