http://gparted-forum.surf4.info/viewtopic.php?id=13418 This guide seems to
explain how to do what you want. What you need to do it seems is combine
your unallocated space and then use that to resize that partition.
When using gparted I would take this in mind from their documentation site
(http://gparted.sourceforge.net/display-doc.php?name=help-manual&lang=C)
"Caution
Editing partitions has the potential to cause LOSS of DATA.
The gparted application is designed to enable you to edit partitions while
reducing the risk of data loss. The application is carefully tested and is
used by the GParted project team. However, loss of data might occur due to
software bugs, hardware problems, or power failure.
You can help to reduce the risk of data loss by not mounting or unmounting
partitions outside of the gparted application while gparted is running.
You are advised to BACKUP your DATA before using the gparted application. "