Filemaker is not a suitable option for the gallery's data sharing needs due to its limitations in integrating with SQL databases and running across platforms like Macs. While Filemaker's external SQL sources feature allows connecting to SQL databases, it has significant limitations including inability to base value lists on external data, date/time data entry restrictions, potential for out of date external data, lack of binary data support, slow scrolling of large record sets, and sorting not performed in the database. Filemaker is primarily designed for smaller, single platform solutions rather than scaling beyond a purely Filemaker based solution.