Traditionally Speaking… What is tradition anymore,
I don’t believe being raised By Gay parents can be any more difficult for children then the situations many are raised in today.
Being a Single mother ( father was never in the pic ) I have learned, as I am sure many parents have, there can be no ideal situation for raising kids.
As gay parents, you would face a lot of diversity yourself, constant opinions of those around you, And sadly the fact that a large part of society would judge your child without ever giving that child a chance simply because of his family situation.
I think many children are raised quite stable by gay parents, There are always plenty of other family members to help balance out the confusion the child may feel, but as the parents you must also be prepared to deal with some of the emotional trauma that the child will go through at certain developmental ages, when he is harrassed at school or by adults with closed minds. Because all though the child can and probably will understand, He will also at times feel isolated confused, and angry, at the situation he was put into ( all this possibility's not facts ).
I don't think you should just look at it as gay parents, But just as parents, Be it being raised by a single parent, Gay Parents, or straight Parents, There is a lot a child deals with just to grow up, Anything outside of what society considers normal, can make it just that much more difficult, But it still can be done succesfully