So I did a full install of Ubuntu (all default settings) 12.04 to a 40GB drive. I've since cloned the drive (full clone, incl. boot sector, etc.) to a 120GB drive. But now, I've got about 80GB of unused space since the partition sizes were kept the same.

Can I safely resize the ext4 partition (now ~30GB) using gparted on a livecd, without having to deal with any funkyness?