Hi,
I have checked out the TI-Android-GingerBread-2.3.4-DevKit-2.1 sources using git. Tools folder as refered in http://processors.wiki.ti.com/index.php/TI-Android-GingerBread-2.3.4-DevKit-2.1_DeveloperGuide#To%20generate%20SD/MMC%20card%20to%20boot%20Android is missing.
I couldn't locate "signGP tool". Please do correct the references in the documentation.
Thanks and Regards,
Rakesh.M