What is a gold seal flight instructor and how does it differ from a usual flight instructor? Does it offer any additional privileges or prestige?
A gold seal flight instructor is obtained by having a ground instructor certificate and within the previous 24 months have a pass/fail rate of 80% or above and recommending at least 10 applicants.
It is a way for the FAA to recognize the best instructors in the industry. You do not get any special privileges with the gold seal.
See AC 61-65 for more details.