This book constitutes the refereed proceedings of the Second International Conference on Generic Programming and Component Engineering, GPCE 2003, held in Erfurt, Germany in September 2003. The 21 revised full papers presented were carefully reviewed and selected from 62 submissions. The papers are organized in topical sections on domain-specific languages, staged programming, modeling to code, aspect-orientation, meta-programming and language extension, automating design-to-code transitions, principled domain-specific approaches, and generation and translation.