Does this has yaoi/shonen ai??
Not really?
The thing is that the real life character of Robespierre behind the French Revolution and the Reign of Terror seems to be represented by both Gideon and Georges which might be why there is such closeness to them.
Frankly, I'm up for it. But they won't go there...might hint at unrequited love or some such. But that's it.
Does this has any romance?
Not exactly, but there are times where they experiment a little with the thought of a romance (ex. around chapter 25-27 SPOILERS if you haven't gone that far, and around chapters 40-43)
Okay thanks. Tho I wish there were more