Diddo what Lake Huron said. My gutter is also the awning track, and has a seam right over the main door. It use to leak on my head when I'd go in or out while it was raining. They could have placed the seam at the other end of the trailer and it would have leaked over the bedroom door. Not the ideal spot but better than the main door. Go figure!
I did what LH did - just put a dab of caulk on it and that took care of the leak. Since the gutter is metal, you could also use a dab of J.B. Weld.