If it was done correctly, no worries, if it was done wrong worry!
One of the best painters in the world, Billy B, paints on gel coat all the time. His paint jobs often cost more than the actual boat... I can't easily find pictures of his work...
Jamie Jamison also did awesome paint over gel coat. This is one Jamie did.... the paint is 18 years old!
Since it's a Sanger I wouldn't be surprised if someone that new what they were doing did the paint... Sanger has that history.