PT Gas Pipeline Transportation (PT GPT) is a crucial part of Indonesia's energy infrastructure, particularly in natural gas transportation through pipelines. To ensure the contract with Singapore after 2028, PT GPT must develop a business development strategy to efficiently carry out operational activities. This study aims to identify opportunities and challenges in developing the Strategic Business Unit Green Energy (Hydrogen and Biomethane) PT. GPT, focusing on the green energy market. The EFAS Score of 3.8 indicates that PT GPT can handle external factors and has good internal strengths in managing and developing the business unit. High internal capabilities, such as existing technology, infrastructure, and human resource capabilities, enable PT GPT to develop its green energy SBU more effectively. The Space Matrix suggests an aggressive strategy to develop hydrogen and biomethane green energy by utilizing existing opportunities. PT GPT is in the Question Marks category, with a relative market share of 10% for hydrogen and 5% for biomethane. The Strategy Formulation Results show a comprehensive approach, focusing on internal strengths and external opportunities. The Marketing and Education strategy can drive product adoption, while the ST strategy focuses on reducing costs and increasing product competitiveness. The Technology Innovation Strategy emphasizes investment in research and development to create more efficient and environmentally friendly solutions. The Sustainability Strategy ensures operational sustainability to comply with regulations and support long-term sustainability.