Convert GNUMERIC to XLS (Excel)

The GNUMERIC file extension, is associated with the Gnumeric Spreadsheet program, part of the GNOME Free Software Desktop Project. Developed by Miguel de Icaza and first released in 2001, Gnumeric is a free, open-source spreadsheet application designed to replace proprietary software like Microsoft Excel. The GNUMERIC format is based on XML and compressed with gzip, ensuring efficient data storage and compatibility with various file formats. It is widely used for data analysis, statistical tasks, and scientific applications due to its accuracy and comprehensive features.

The XLS file extension, short for "Excel Spreadsheet", is a legacy format used by Microsoft Excel for storing spreadsheet data. Introduced with Excel 2.0 in 1987, it was the primary format until the introduction of XLSX in 2007. XLS files contain data organized in rows and columns, supporting formulas, macros, and various formatting options, making them essential for data analysis and financial reporting. Despite being replaced by the more robust and secure XLSX format, XLS files remain widely used in many legacy systems and applications.