To enhance the user experience and resource discoverability of Infopedia, the Singapore encyclopedia, the National Library Board of Singapore (NLB) uses Generative Pre-trained Transformer 4 (GPT-4) for Named Entity Recognition (NER), aiming to automate metadata enrichment of its digital encyclopedia articles. This initiative leverages GPT-4's capabilities in accurately identifying and incorporating relevant Singaporean entities before integrating them into the NLB's Knowledge Graph, improving recommendations of related resources. An evaluation on a subset of 100 articles demonstrates a precision score of 0.975, indicating high entity detection with minimal inaccuracies. The team acknowledges challenges related to GPT-4’s black-box nature and the potential for non-reproducibility. This effort illustrates the potential of generative AI to streamline metadata enrichment processes, offering a promising avenue for enhancing metadata of digital libraries.