What is .GNUMERIC file extension?
Spreadsheet created by Gnumeric, an open source spreadsheet program that is part of the GNOME Free Software Desktop Project; stores the formatting information, charts, mathematical formulas, and data used in the spreadsheet.
GNUMERIC files are similar to Excel spreadsheet files (.XLSX) and both contain data stored in the XML format. Unlike XLSX files, GNUMERIC files are compressed using GZIP compression.
NOTE: GNUMERIC files are also saved with the .GNM file extension.
You can see a list of software programs here on easyfileopener.org that can open this file type so that you don’t need to search for it on the web. You can then open your file with this extension using a software listed below.