Not by peer reviewed science, it hasn't.So not all gay parents are good parents. Who said they were? My son played on a state ranked football team here in Georgia for 4 seasons with a boy raised by 2 gay men. Weird? In my opinion yes but the boy's heterosexual parents abandoned him to the hell of foster care, aka parenting for cash. The gay men adopted him at age 6 when the boy had failed 1st grade. Kid graduated Vanderbilt and is an IT consultant now. Engaged to be married. I prefer to see man and wife raising kids but have seen numerous cases here in deep south where kids raised by gay folk turn out just fine and in most cases as good or better than heterosexual parents where more than 50% are divorced anyway.
and some kids raised by single parents turn out well. The issue is percentages, and percentages are against gay parents raising successful kids.
No they aren't or you'd be able to demonstrate said "percentage".
already been provided several times by several posters, if you choose to ignore it, thats up to you.