Today’s energy systems, spanning passenger vehicles, heavy-duty and off-highway machinery, rail, marine, and aerospace platforms, as well as stationary applications like residential microgrids and data centers, face increasingly complex demands to balance performance, efficiency, emissions compliance, and durability. GT-SUITE offers a comprehensive simulation platform that empowers engineers to conceptualize, design, analyze, and optimize energy flow across any system, regardless of industry or application. By combining physics-based predictive modeling with AI-assisted workflows, modular architecture, and real-time-capable solvers, GT-SUITE accelerates development from early concept through validation, extending system life, minimizing energy consumption, and delivering superior performance across diverse transportation and energy domains.