Reference: https://download.gluster.org/pub/gluster/glusterfs/3.4/LATEST/Debian/wheezy/
Packages of GlusterFS 3.4.7 for Debian wheezy are available here from the Gluster Community…

Add the GPG key to apt:
wget -O - http://download.gluster.org/pub/gluster/glusterfs/3.4/LATEST/Debian/wheezy/pubkey.gpg | apt-key add -
Add the source:
echo deb http://download.gluster.org/pub/gluster/glusterfs/3.4/LATEST/Debian/wheezy/apt wheezy main > /etc/apt/sources.list.d/gluster.list
Update package list:
apt-get update
Install:
apt-get install [ glusterfs-server | glusterfs-client ]
Packages from the Debian project are available in the unstable distribution:
http://packages.debian.org/search?keywords=glusterfs&searchon=names&suite=unstable&section=all