GPT Builder Tools is a platform designed for GPT developers, aimed at helping them enhance the ranking of their GPT products in the OpenAI store and attract more users through analysis, payment, and marketing tools. The platform allows developers to track their GPT's performance, reach a wider audience, and monetize their GPTs in the OpenAI store. Additionally, it offers an analytics dashboard for users to gain better insights into their user base, thus optimizing user experience and market performance.