Your partition table looks OK to me.

I am guessing you may just be confusing yourself.

The way I understand, based on your description, is that you want to format hda5 to Fat32 but are afraid losing the data in the /home and Gparted is refusing to comply with your wish.

Unless during the installation you have used partition sda5 to mount as the /home there should be another /home inside the Linux residing in hda1 which is about the same size of 59Gb.

If you have installed Ubuntu there then your data should be inside hda1 since you can't even use hda5 at the moment.

hda5 has been created as a type 83 partition suitable for Linux ext2/3 or Reiserfs filing system. Any attempt to format it in fat32 may cause problem unless you alter the partition ID which should "c" for fat32.

Before I offer command to format hda5 can you post the /etc/fstab of Ubuntu here? You fstab will tell us if hda5 is to be mounted as /home.

If you want to post information in the terminal, like from "fdisk -l", you can high light the text and right click the mouse and click copy. Go into the web site to anywhere you want to post and right click again to select paste and you will see the text copied.