The GAIA Tech Tree is an interactive, knowledge-graph-based decision support system that maps key energy technologies—such as nuclear fusion and fission—along with their interdependencies, maturity levels, and potential impacts. Its distinctive feature is its neuro-symbolic approach: it combines structured expert knowledge with AI-driven analysis, enabling users to explore development pathways and identify bottlenecks as well as high-impact investment opportunities that could accelerate the development of safe and sustainable energy technologies.