  In a 1$^{\rm st}$ step I present results from our new set of evolutionary
synthesis models for Simple (= single burst) Stellar Populations ({\bf SSP}s)
of various metallicities, and in a 2$^{\rm nd}$ step I combine these results
with the information we have about the redshift evolution of spiral galaxies'
ISM abundances. The aim is to provide a grid of color and luminosity
distibutions of any secondary GC population formed at some time in the past in
those mergers for comparison with observations.
