Hi,
I found out following information regarding this.
We could only search for the nearby iPhone and iPod touch devices using GameKit APIs.
Using External Accessory framework, we are able to list nearby Bluetooth devices ( MFi Complaint) that are already paired using iPhone Settings Application.
So there's some limitation with the Apple APIs when it comes to Bluetooth searching for non-iPhone devices. It could be due to security concerns.
Thanks,
Tharindu