I can give you some ideas about the matchup off the top of my head, some of it may be wrong as I haven’t really spent any time in training mode against him. Gouken’s bad in the sense that he doesn’t have any good reversals. You can safe jump and meaty him to death, he’s got no offensive answer for either.
And i know what some of you are thinking, what about wakeup counter?..it’s got startup which probably means that it gets stuffed by meaties. As far as the counter, he’s gotta guess high or low (or burn meter to not guess at all), so be careful with the pokes. If you see him trying to counter your jump-ins instead of AA like he should, bait out counter’s by doing the jump-in really early so its not active when you get close to him, or empty jump.
His fireball is good if I recall correctly so dash ultra or headbutt is unlikely to connect unless he does ex and you read it well. You should be able to grab his palm, and the ex if you wait a bit then grab. He hits like a mack truck and his flip mixup is akuma esque but doesn’t do much. You can’t AA it so well because of the parry, so guess and mix-in some dash behinds and dash back st.fp etc. Up close jab probably rapes him, he’s so slow. You might want to verify if his flip throw grabs crouching and in the air so you know how to avoid it. Also his sweep has RANGE, beware demon flip dive kick, cr.hk. You can probably focus attack that.
Beware of the backthrow, you have an eternity to tech it, you just have to do it late.
j.mp if he attempts to air tatsu away, it’s really bad. But just put the pressure on gouken, he doesn’t have solid answers to pressure in terms of normals, or Specials for that matter. IF you get caught in a combo that’s your ass, but good footsies should own Gouken IMO. Don’t be afraid of chip damage, be afraid of palm combos that stun easy.
EDIT
Wrong, Gouken’s counter has hyper armor, so it goes into effect on startup, so it’s a viable method to beat meaties and safe jumps without meter. If he guess wrong he gets hit, but if he uses ex it always works.