Yeah his gravity didn't work because it's two intangible forces against each other. So going "logia" was his way of countering the gravity force. So you have to apply real life situations to get the outcome.I'm tempted to say Kizaru spanks, but it'll be high diff at least.
Iirc Fujitora's gravity didn't hurt Sabo (a logia), he was thrown here and there but wasn't hurt by the gravity, also his meteors or rubble shouldn't affect a logia. From what he has shown, he can only hope to beat Kizaru in close combat. Kizaru isn't particularly weak in close combat, he's also adept at long distances. It's a very bad matchup for Fujitora.