Yeah, that's pretty funny.
You could look at it that way. Both of their attractions seem rather.. strong.
Gil and Kotomine's interactions are weird though, at one point it looked like they were 5 seconds away from a make out session.
The weirdest thing that I don't get with Kirei is whether he's fixated more on Kiritsugu or Kariya. During the beginning of the show he was all "omg this Kiritsugu guy is so mysterious!". Then as Gil turned him over they said that Kariya was the person Kiritsugu was interested in the most because he kept monitoring him with Assassins. Now we're back to Kiritsugu fanboyism with that photo pulling him back.