The Gatekeeper project aimed to enhance interoperability between different Electronic Lab Notebooks (ELNs) and data sources within the ETH Domain. Leveraging the Renku platform, Gatekeeper established a unified research data management (RDM) system that integrates diverse ELNs and other data repositories, thereby significantly improving data sharing, collaboration, and FAIR data compliance across various research groups. Major achievements include successful integration of multiple ELNs and repositories, a metadata viewer, markdown-based documentation, and strengthened collaboration features. This work enhances reproducibility, transparency, and efficient data use across ETH research communities.