I think I remember talking with him about this and him confirming it, a while ago, though there's only one way to find out... scroll back in time. Let me check real quick.
Okay, I found nothing. So I was wrong. Let's see if Cetus answers any time soon.
I.C.O. is mainly a kinetic VN so there won't be routes exactly. Romancing any character I guess isn't a controllable option but rather whatever works for the story. I hope that's a sufficient answer XP.
That's not to say romance elements won't be in the game necessarily but they'll be beyond the control of the player. Who knows? Judah could develop feelings for Gil or Shay and we can see something like that happen.