Hiring a Gosu developer can be beneficial due to their expertise in a statically-typed language used in large-scale enterprise applications. They have the ability to manage complex business logic with ease, ensuring robustness and reliability. Gosu's unique features like Open Type System allow developers to directly use information from resources, enhancing productivity. Gosu developers can also handle XML and database manipulation effectively. Their knowledge in Gosu can be leveraged for Guidewire implementations, a popular software in insurance industries, making them valuable for such businesses. Their niche skill set makes them crucial for specific project needs.