The fact that the system is even called the GUT is absurd. It's nothing more than binomial distribution.
Observing it is like observing that numbers hit about once every 37 spins. Such an observation doesn't tell you which numbers are more likely to hit, and knowing the probability of the game doesn't enable you to side step it.
Now here's something that you don't know about the "law of the third". The law of the third, which the GUT basically plagiarizes, has actually been around for quite a long time. It only became popular after 1982 because of two gamblers that were involved in an incident in North Hampton. Specifically the Rubicon Club Casino.
The two men were playing visual ballistics and were busted using while using a hidden communication device. (The device enabled the vb observer to discretely say the predicted number into the player's ear so that he could then bet a 12 number section of the wheel.) (It was not a computer.) They had been winning quite a bit of money, all over Europe with their method. When interrogated by the police, the Polish member of the group, Paul Phillips, claimed to be a mathematical genius that had invented a method based on the "Phillip's Law of The Third." Of course, both the name of the man and the system were just a cover story for the visual ballistics.
After being arrested and spending the night in jail, the police chose to let them out of jail and offered them a chance to prove that they weren't cheating by demonstrating their 12 number betting method. So they did, over five whole spins. LOL! When they hit three or four times, the casino and police were flabbergasted at their hit rate. (Keep in mind the police and gaming were basically as stupid and naive as they are now.) Consequently, reports of the law of the third's success spread like wild fire! Everyone wanted in on the system. Even to this day people naively believe that the law of the third can win. All because of a cover story.
Of course, later on, people like Ron Shelly and George Melas came to realize what was really taking place. The men were visual ballistic/wheel watchers. They continued onward, making millions on their tour across Europe. As did some German teams. Their success led to the invention and production of the low profile wheel.
So their you have it. The GUT is a farce. It's a built upon a cover story created by two clever visual ballistic players that made it popular back in 1982.
By the way, I just happen to be friends with both of the men involved in the story.