Your question is a little confusing, but I think you are asking if the exterior mounted antenna you are using on your stratus 3i will work with a GDL 50, the answer is yes.
You should have two antennas, one is your transponder, which handles adsb out and the other is for adsb in reception.
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A&P/IA/ATP
RV-4/160hp/O-320/CS/G3X
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