You can run it without installation by simply running :
 /PATH_TO/WHERE/YOU_UNTARRED_THE_TAR.GZ/gmusicbrowser.pl
(gmusicbrowser.pl will first look for its files in . and then in ../share/gmusicbrowser relative to where it resides)

RPM based distro
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rpm -bb gmusicbrowser.spec
rpm -i gmusicbrowser.rpm

DEB based distro
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sudo ./debian/rules binary
sudo dpkg -i ../gmusicbrowser.deb

other
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make install