How to open .GRA file extension?

If you cannot open a new file that has been saved in the .GRA format you need to download the appropriate software. The manufacturer of .GRA files is Microsoft; .GRA files belong to the Data 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 .GRA files. Activities performed in the order described should solve the problems with all the files in the .GRA format.