Actually I think this is it. He is way calmer now. He stopped mounting my mare. She is still in heat, but he is not doing it anymore. Plus, he is super easy to handle now. Its like someone put a different horse in my pasture lol He still calls to the mare when she is out being worked, but then stops after a bit. I have my mare on mare magic and the gelding on ultra calm. I have not had them on it long enough to make a difference, just about three days. But, I think my gelding is settling in to his new home and seems to be calming way down. Thank the lord! Hope he stays that way.
Out in the pasture it seemed that all the geldings always go a little bit crazy when the mares are in heat, they have never tried to mount a mare or been exceptionally unusual/out of character though.
Also - the calling out could just be an 'I am so lonely and bored, come back and play with me thing', so I personally wouldn't be too worried if that was the only behavior that stuck around.