HostGPT is an AI tool designed to assist users in managing car-sharing operations. It can be classified as an application operating on top of ChatGPT. The central function of this GPT is to enhance the operations of car share hosts by providing professional assistance and support, easing the routine tasks associated with managing car rental services. One of the key features of HostGPT includes responding to guests' questions, comments, or reviews accurately and promptly. It plays a pivotal role in facilitating efficient and effective communication between the car share host and potential renters, thereby helping to establish prompt, responsive customer service. Additionally, HostGPT aids in inventory management. It allows users to add new cars to their inventory effortlessly, simplifying tasks associated with listing new vehicles onto the sharing platform. This improves the host's ability to track and amend their vehicle inventory. Functioning on the ChatGPT framework, HostGPT requires ChatGPT Plus for usage. It serves as a personalized, professional car share host companion, digitizing and automating the mundane and complex tasks associated with car sharing services. It essentially streamlines the service delivery process, making the user's car-sharing experience more efficient and organized.