I have a list if you want to check it out (づ￣ ³￣)づI hope you find something you like (︶︿︶)＝凸(▰˘◡˘▰)
http://www.mangago.me/home/mangalist/10608/
http://www.mangago.me/home/mangalist/130479/
Pink heart means they've raised always raised the kid together. Blue or yellow can mean only one raises the kid or that the two raising the kid together or one is helping out or it can mean one has a kid and the other isn't involved. You can find out which based on the description and based on whether or not the kid is a main character.
huh... jinx!
you'll find other ones here http://www.mangago.me/home/mangalist/24154/
Plz show me every manga with a gay couple raising a kid together ╥﹏╥