Scott took almost two seconds off his personal best in the 200 metres individual medley to claim his second gold medal and secure a second automatic qualifying time for July's World Championships in South Korea.
The University of Stirling swimmer broke away after the halfway stage with the help of an impressive breaststroke leg and finished in one minute, 56.65 seconds, ahead of Thomas Dean (1:58.89) and Joe Litchfield (1:59.50).
The 21-year-old said: "I feel like that sort of time has been there for a while and it was just about getting it out, and I'm really happy with it."
The Glasgow-born swimmer has enjoyed a successful week, breaking the British record in the 100m freestyle final and winning silver medals in the 100m and 200m butterfly races at Tollcross, and goes in the 200m freestyle on Sunday.
When asked if he was meeting or exceeding expectations, he said: "I think it's mixed in different events. That has probably met expectations. Other events, the 200 fly didn't live up to what I wanted to get out of it. I'm happy with the 100 fly and 100 free.
"Expectations of other people, I couldn't care less to be honest. It's about myself and what my coaching and support staff think we can do and what we can go out and achieve."
In the women's race, Siobhan Marie-O'Connor finished more than a second ahead of Alicia Wilson in 2:10.34. The Olympic medallist's time was outside the automatic qualification for Gwangju but inside the consideration time that British Swimming will use for its final selection.
Ben Proud was measured in his analysis after finishing five-hundredths of a second outside the automatic World Championships mark in the 50m freestyle final.
The Plymouth swimmer recorded 21.50 seconds to take gold ahead of Edinburgh University pair David Cumberlidge (22.09) and Jack Thorpe (22.49).
Proud said: "After doing 21.5 this morning and being really relaxed, I kind of thought the qualification time was going to be there.
"But in terms of my preparation I am taking this cycle a little bit slower, a bit more steady, building through with Tokyo (2020 Olympics) in mind. So in regards to that it's pretty good and pretty much where it should be.
"It's about being level-headed and understanding what the end goal is. It's about being realistic and knowing every race I do won't be my best. This was an example. If I can learn from it, that's the best I can do."
Georgia Davies added the 50m freestyle title to the 100m gold medal she won earlier in the week. The European champion won in 28.10 seconds ahead of Lauren Cox (28.20) and Cassie Wild (28.43).
Holly Hibbott was four seconds faster than Leah Crisp as the 20-year-old triumphed in the 400m freestyle final, while Sheffield swimmer Samuel Budd took gold in a youthful 800m freestyle final.
