The thegentlemen ransomware group listed GCA Professional on its data leak site on 2026-04-04. Country: HK Sector: Professional Services Domains named: gca-group.com, zoominfo.com Claim as published on the leak site: gca-group.com zoominfo.com/c/gca-professional-services-group-ltd/346680381 GCA Professional Services Group is a leading financial services provider headquartered in Hong Kong, with over 25 years of experience serving blue-chip institutional, corporate, and individual clients globally. Its core services include valuation and advisory, corporate finance, mining and mineral consultancy, and corporate services.