Just to add what I've found. Any help here

This Site has pics of prime internals some of which you can see gps chip. I think is is the BCM 47511 As seen in the below screenshot

wirelessgoodness.com/2011/11/02/asus-transformer-prime-gets-torn-down-kal-el-pictured/


This Site says broadcom "gps" for prime

liliputing.com/2011/11/asus-eee-pad-transformer-prime-tear-down-shows-kal-el-chip-25whr-battery.html

Here's a Site for the specs for the 47511


investor.broadcom.com/common/mobile/iphone/releasedetail.cfm?releaseid=548713&CompanyID=BRCM& mobileid=