I did not go into the details as usual
But first version of 006B090100.GCD was announced by Garmin as patch to 006B048201.bin SW and not as FirmwareUpdateforGTMxxTrafficReceiverType3:

Code:
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Also I put another loophole old classic TMC for all FM radio and in my heart I do believe that 006B048201.bin use all receivers for old broadcasting format likes in my car radio in old Jeep.