The GAIA (Generative AI for Biomedical Image Analysis) workshop at ICCV 2025 explores how generative AI is transforming medical imaging and healthcare. The workshop focuses on three key areas: (1) Data synthesis and clinical modeling using generative models for anatomically accurate image creation and disease simulation, (2) Multimodal learning that integrates visual data with medical reports through large language models, and (3) Workflow automation streamlining medical imaging from acquisition to diagnosis. Bringing together experts from computer vision, healthcare, and AI research, the workshop addresses challenges in interpretability, regulatory compliance, and clinical reliability while showcasing opportunities for interdisciplinary collaboration in advancing biomedical image analysis.