A team at Columbia Law School has collected on one website the abstracts of all peer-reviewed studies that have addressed this question since 1980 so that anyone can examine the research directly, and not rely on talking heads or potential groupthink. Even when we might not agree with a study’s conclusions—with how a researcher interpreted the data—we still included it if it went through peer review and was relevant to the topic at hand. Peer review, of course, isn’t perfect, but it’s one of the best ways the world has to ensure that research conclusions are at least the product of good-faith efforts to get at the truth.
The Columbia project is the largest collection of peer-reviewed scholarship on gay parenting to date. What does it show? We found 71 studies concluding that kids with gay parents fare no worse than others and only four concluding that they had problems. But those four studies all suffered from the same gross limitation: The children with gay parents were lumped in with children of family breakup, a cohort known to face higher risks linked to the trauma of family dissolution.
Even the notion that some try to put forth that there are no good studies is wrong...the studies, while not perfect do give us a very good idea on the conclusions and that is that gay homes are not better nor worse.
Here is a link to all the studies
What does the scholarly research say about the well-being of children with gay or lesbian parents? | What We Know