Surrogate motherhood is not correct, the child should have normal parents. If gays want to have a child, then they can be treated and create a normal family in which they can give birth to a child naturally.
There is nothing wrong with surrogate motherhood, but it is the upbringing which matter. Even a lot of heterosexual couples are having surrogate babies nowadays. But the gay lifestyle can be harmful for the kids. There is a high chance of sex abuse and drug addiction.
It is disgusting to sell their children through surrogate motherhood, donation of eggs and donation of sperm. Adult children do not sell, but on their cages or only newborns want to earn money. This is degradation and I do not support such a scheme. Childless couples with traditional sexual orientation need to undergo treatment for infertility or can adopt orphans.
I don't find anything wrong with surrogacy. It is a mutually beneficial agreement. Rich westerners can have children despite their medical conditions, and at the same time poor women living in the third world nations can benefit out of it financially. Surrogacy was legal in my country until 2015. But the government banned it claiming that the women are being exploited.