How to open .GRO file extension?

If you cannot open a new file that has been saved in the .GRO format you need to download the appropriate software. The manufacturer of .GRO files is Hewlett-Packard; .GRO files belong to the Raster Image Files category. After downloading the application from the list available on our website just run an unknown file, and as the default set the newly installed application supporting the .GRO files. Activities performed in the order described should solve the problems with all the files in the .GRO format.