iOS and Bluetooth

Question for anyone who does hardware EE: I would like to create an arduino device that lets me feed location data like that which would be sent to an ipad by a garmin gps with bluetooth. What is involved with doing this? Would would it be possible to use an arduino with one of the various bluetooth modules, such as the Feasycom BT986, which is supposedly MFi certified, or would the complete end device have to be certified? I tried to find info on ADC but apparently the prolies like me aren’t allowed to know (have to have a company/organization account to see details, it seems).