We introduce a new galactic chemo-dynamical evolution code, called GCD+ (Kawata & Gibson 2003), for studies of galaxy formation and evolution. This code is a vector/parallel three-dimensional tree N-body/smoothed particle hydrodynamics code which includes self-gravity, hydrodynamics, radiative cooling, star formation, supernova feedback, and metal enrichment. GCD+ includes both Type II (SNe II) and Ia (SNe Ia) supernovae, and chemical enrichment from intermediate mass stars, taking into account the lifetime of progenitor stars. We present our recent studies of Galactic chemodynamics with GCD+.