How will my gasteroskesis effect me as an adult?

Depends. Gastroschisis treated as a newborn can increase the risk of developing an intestinal obstruction due to scarring, however this is rare.
It Shouldn't. If you only have gastroschisis alone and no other birth defects, and it was repaired correctly in infancy then you should have no long lasting complications. It can be genetically passed to your unborn children, so your ob/gyn should be aware if you ever have kids.