SignGPT is a UKRI EPSRC Programme Grant focused on the development of an AI-powered translation system capable of unconstrained, bidirectional translation between British Sign Language (BSL) and English. The project will build the first generative predictive transformer for sign language, combining computer vision, sign linguistics, and machine learning. It is led by an interdisciplinary team from the University of Surrey, University of Oxford, and University College London, with direct involvement from Deaf organisations and community partners.