Furthermore, is outrage good on gyarados?
Outrage was never relevant to Gyarados. For neutral damage it would still be useful but if your using Gyarados for neutral damage then you probably could be using something else that does have type advantage.
Secondly, what is the best fast move for gyarados? dragon breath
Likewise, is outrage a good move Pokemon go?
Outrage is a Dragon-type Main move in Pokémon GO that deals 110 damage and costs 50 energy. It is strong against Dragon Pokémon and weak against Steel Pokémon.
Is outrage better than Dragon Pulse?
Dragon Pulse
You're better off using the other moves in PvP. In PvP, Dragon Pulse once again bites the dust when compared to Outrage. With the same charge energy of 60, Dragon Pulse does only 90 DMG when you compare it to Outrage's 110 DMG. In a nutshell, Outrage simply takes out the pulse from Dragon Pulse.