3rd Hunger Games
During training, he received the score of a 9.
During the Games, in the cornucopia bloodbath, he escaped, took a bag, and a knife, and killed no tributes on that day. Since the arena was located in a steppe, so there were no hiding places, making the careers dominate. However, Gliese was smart, and stole their supplies while they were killing other tributes. They then almost starved, until the feast happened, when all 6 careers fought to the death over a stale piece of bread. When the last career, from District 4, wasn't looking, Gliese took a sword down her back, killing her, making him the victor. Also, his odds of winning were 15-1.
5th Hunger Games
During his meeting with Rummage, Gliese was described as being a 19 year old man, has a extensive amount of vocabulary, just like the pair from 5 that participated in this year's Games. He has glasses, and brown hair.
This year, he mentored Soren Galloway into victory that year.
This time, he is the mentor for both tributes this year. He is described as being cool, but not a geek or a nerd, which was surprising to Magnus, since most people from 3 act nerdy.
During this time, he mentored Thorburn this year, along with Venture Allardyce. When she gets on the train for the first time, Gliese compliments on how good this year's tributes look. When asked on survival, he gives the pair some life saving advice to survive out there. When the tributes get their scores, his expectations were blown out of the water. When Thorburn wins the Games, he and her become neighbors in Victor's Village.
In one of the film places they used to shoot the first film, there were many pillars showing the names of each victor that won a Hunger Games. As expected, his name showed up on one of the pillars there, along with the other victors from his district.