What is .GNO file extension?
Project file created by GenoPro, a free program used to create genealogies; contains genealogy project data, including family trees, pedigrees, pictures, dates, and other genealogy information; used to record family history, analyze ancestries, and print family tree reports.
NOTE: GNO files can support up to one million individuals. They also support Unicode text.
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.