I have a gallade,and I wanted to know its IVs on Attack.
He is level 70,Adamant,with 256 Attack stat and 252 EVs on Attack,i really wanted to know If he is strong.
Your Gallade has either 13 or 14 IVs in attack. Slightly below average.
Your Gallade has 13 or 14 IVs in Attack. Also, if this is Gen. 7 or Gen. 8, you can max out its IVs by Hyper Training it.
Source- I just calculated it using an IV calculator using your information.
Hope I helped!