Please note that this method will get you the GUI file only. Images will not be included.

If you need to extract the existing GUI from an iOS device, then you first must do the following:

1. Jailbreak the device (not covered in this guide)
2. Enable SSH and connect to the device using a program such as Cyberduck (not covered by this guide)

Once you have connected to the device:

1. Navigate to /private/var/mobile/applications
2. You then need to find the folder for iViewer, this will mean opening each folder until you find a folder within named iViewer4.app
3. Once you have ascertained which folder is for the iViewer application, navigate to /documents/caches
4. This folder will have two other folders in it, one of them will contain a file named cached.gui
5. Download this file, this is your main gui file

We have tested this method on a single page GUI file only - it may vary for GUI's with multiple pages etc.