GPT Baker is an Artificial Intelligence tool developed by abidlabs and hosted on Hugging Face Spaces, a community platform for sharing and discovering machine learning applications.

The specific utility of GPT Baker isn't explicitly stated in the provided text, however, referencing the key components such as 'GPT' and 'Baker', it can be inferred that the tool may be in some way associated with Generative Pretrained Transformers (GPT), a type of model architecture extensively used in Natural Language Processing tasks.

The term 'Baker' can signify the possibility of this tool being an application that enables or facilitates the 'baking' (preparing, setting up, optimizing) of such models for specific tasks or applications.

More specific details about its functionality, capabilities, and use-cases can't be accurately inferred from the provided text. Therefore, potential users are recommended to visit the specific Hugging Face Space of GPT Baker for precise and comprehensive details.