i have never won a big amount in gambling, thought it depends on what you mean by big amount though. In my case i have never won 2 and above bitcoin at a stretch, just closer to it.
Going back to your question, if i can remember well, i did gave out a some of my winning to a friend who needed help then.
Not the whole wining though but just a split. Then, we were in school and was very broke, long time ago though.