Traditionaly the gift should be sent to the bride's home or her mother's home. But it is perfectly okay to send the gift to the couple's home if they live together, before or after the wedding.
When someone prints no gifts it doesn't mean that they do not want gifts, it means Please do not bring your gift to the ceremony or reception. Most likely reason is there just is no room to store them. Send it to their house or their parents house.
No gifts means NO GIFTS, if you want gifts sent somewhere else then you should say it. Giving a gift is not maditory anyway. I didn't know you invited your guests for the gifts. People are so greedy and only think of themselves and what am I gonna get. Get over it, if you want something then buy it yourself. If you're gonna spend all this money on a wedding and then complain about how much you spent or what so and so didn't bring you then you don't need to be having a party anyway. Obviously peoples priorities are not straight.