I suspect this won't go to court. Gus knows what he's accused of and if he wants to have it all spelled out in public he may live to regret it.
Let's assume it went to a tribunal and Gus actually won. We'd pay the money (not easily, but we'd find it) but the accusations that the club made would be out there in the open, and people would doubtless believe much of what was said, including chairmen of other clubs.
Let Gus go on the media merry-go-round expressing mock exasperation with his treatment if he likes. He can get away with avoiding detail about what really happened "for legal reasons" on the radio and TV. In court, we'd get the full story. I don't know the whole story about what went on but I'd be pretty certain Gus won't come out of any tribunal with his reputation enhanced.
If he won it, it would have been proven in court to have been false, or not reasonably considered serious enough to fire someone. If he won, the only people who would believe the accusations are the people who want to hate him regardless of facts.