How to open .GP4 file extension?

If you cannot open a new file that has been saved in the .GP4 format you need to download the appropriate software. The manufacturer of .GP4 files is Arobas Music; .GP4 files belong to the Misc 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 .GP4 files. Activities performed in the order described should solve the problems with all the files in the .GP4 format.