This book constitutes the thoroughly refereed post-proceedings of the Second International Symposium on Generative and Component-Based Software Engineering, GCSE 2000, held in Erfurt, Germany in October 2000. The twelve revised full papers presented with two invited keynote papers were carefully reviewed and selected from 29 submissions. The book offers topical sections on aspects and patterns, models and paradigms, components and architectures, and Mixin-based composition and metaprogramming.