Hey everyone, and thank you for the replies!

The original context was from one of Mr. Happy's videos:
"Scholar: Strongest direct heals are highly gated"

Going off of Anova's explanation and common sense, it actually makes the most sense and confirmed what I thought:
Quote Originally Posted by Anova View Post
So, "gated healing" is probably referring to Scholar Abilities, who has an Aetherflow Mechanic that powers most of its Healing abilities. These abilities don't cost mp, but you can only use 3 within a 60sec period. So those Scholar Abilities are "Gated" to 3 total uses every 60 seconds.
One other question; does Astrologian or White Mage have similar situations?
Thanks again, and I did learn some other stuff too