I want to know beforehand, so can u help me? :3

okay, so im playing hg. my cousin traded me her Red Gyarados from the lake of rage in her ss over to me, and then i caught the red gyarados in my game. They were opposite genders.

i put them in the day-care...and they had an egg!

I want to know...am i going to have a shiny magikarp or something? just curious. cause that would be so neat!! ^____^