找不到官方的了，但这里有很详细的eligibility requirements

https://unstop.com/hackathons/google-code-jam-google-10587

抄一段 --

• You are not an immediate family member (parent, child, sibling, or spouse) of, or living in the same household as, a Google employee or an employee of any Google affiliate or subsidiary.

那家孩子很可能不知道，也可能不是真想赢什么，就想参与一下作为锻炼试个手。但一旦作为奖项写上了college app，熟悉这比赛的AO们可能会觉得这孩子有投机取巧的嫌疑。诚信画上了问号，基本上就救不回来了。