The GOSH Portal Extension provides comprehensive customization specifically designed for Great Ormond Street Hospital’s data portal, featuring healthcare institution branding, medical research styling, and GOSH-specific functionality tailored to pediatric healthcare data sharing, medical research transparency, and clinical data management in one of the world’s leading children’s hospitals. This specialized extension incorporates GOSH’s institutional visual identity including healthcare-appropriate colors, medical institution logos, typography, and design patterns while maintaining compliance with healthcare accessibility standards, NHS digital service guidelines, and medical data privacy requirements. The extension includes custom page layouts optimized for medical research data presentation, specialized templates for clinical datasets, and integration with GOSH’s healthcare infrastructure and NHS data sharing systems. Advanced features include healthcare terminology localization, specialized widgets for displaying clinical research statistics, patient outcome data (anonymized), medical research information, and GOSH-specific pediatric healthcare and research data visualization appropriate for medical professionals, researchers, and healthcare policy makers. The theme provides enhanced navigation structures tailored to healthcare stakeholder needs including clinicians, medical researchers, healthcare administrators, and policy makers, quick access to frequently requested medical research data categories, and integration with GOSH’s research platforms and NHS healthcare systems. Customizations include specialized dataset categories for medical research operations including clinical trials, patient outcomes, healthcare quality metrics, and pediatric research, enhanced search functionality with medical classification filtering and clinical research categorization systems, and secure interfaces designed for healthcare professional access to medical research data and clinical information. Administrative features provide content management tools for GOSH staff and NHS healthcare personnel, workflow integration with healthcare management systems, and analytics tracking for medical research data usage and healthcare community engagement patterns. Integration capabilities include connections to GOSH clinical databases, NHS national healthcare systems, medical research networks, and international pediatric healthcare research platforms for comprehensive healthcare data sharing and medical research transparency. Essential for GOSH’s medical research transparency initiatives, supporting healthcare research requirements, enhancing medical professional access to pediatric research data, and promoting evidence-based healthcare policy through improved data accessibility and medical research accountability in pediatric healthcare excellence and innovation at one of the world’s premier children’s hospitals.