Yes, Greek gods shows that they were wise and just. In book 7, Apollo shown his wise plan to Athena.
they decide that it was better to sent one person from Achaians and fight Prince Hector of Troy, and the plan was made. Aias fought Hector but it was stopped by the heralds' message. But in their fight, Hector took too much damage but because it was stopped, they both gave gifts too honor their fight.Apollo's intension was to stop Athena in helping the Achaians. So to be fair he decided to come up with that plan.
In book 8, Zeus showed that his power was the greatest of all. He commanded that he doesn't want to see any god nor goddess helping one of the group. He said that if anyone helped either of the group, he will be punish and will be sent to tartarus, lower than the place of hades from Olympus.
These are some instances that shows how wise and fair Greek gods.
