There's an important distinction between validity and liceity to be made here. If the "parents" of the child found a priest willing to do the baptism (or performed the baptism themselves) using the proper matter, form, intent, and disposition, then said baptism would be valid.

So, the answer to "can they be baptized?" Yes, in the same way a Catholic grandma could baptize her now-atheists daughter's child in secret.

However, many people would argue against the liceity (whether the baptism was in accord with church law) in the same way you did. I'd place a lot of emphasis on "altogether lacking" in regards to the "founded hope." There are children of a lot of irregular situations (divorced and civilly remarried/unmarried/etc) that are baptized. I think a conversation would need to be had about the motivations (as you would with any irregular situation) and the godparent(s) would need to be in good standing. You certainly couldn't have a gay couple stand in as godparents. Lastly, I think a private ceremony for the baptism would be appropriate, to avoid scandal.

(And I'm very much not liberal on these matters)

PabloSerna said:

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What exactly is scandalous about the baptism of a child?

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The public appearance in the church of two men simulating marriage and co-parentage of a child is absolutely scandalous.

I don't think you'd like the muslim solution for homosexuality.

Nope, there's no way you're that ignorant.

You're not responding in good faith, so I'm not going to waste my time typing up a response.