There's only one GUI tool for working with the Logical Volume Management paradigm, and in Fedora it's already been deprecated without a functional replacement.

(Apparently LVM is the partitioning scheme of the future)

Anyway, this is a personal note to myself that system-config-lvm is the best way to go, and it's available from the Fedora archives here.  To go straight to the download, go here.

It was last available in Fedora 19, so who knows how long it'll work for.