GO Enrichment and Clustering Tool is an integrated command-line tool for Gene Ontology (GO) enrichment analysis and clustering of enrichment results. It performs hypergeometric tests for enrichment and uses gene overlap-based similarity (Jaccard / Ochiai) to reduce dimensionality (UMAP / MDS / t‑SNE) and apply unsupervised clustering (Mean‑Shift / HDBSCAN) to the enriched GO terms. Multiple visualization charts and network files are generated to help researchers explore functional modules from a global perspective.