He was born in New Mexico on January 20th 2001 to Enrique and Theresa Brandt As a child he used to stay inside a lot and was actually overweight when he was 8 years old. His father was worried about his weight, so he decided that everyday they would go on exercises and by the time he turned 11 he was at a healthy weight. He also felt more confident and began to make more friends. He is signed up for the soccer team. When he was 12 years old, he began to date a girl named Kaycee Ballinger, in seventh and eighth grade.
One day before he moved, he learned something about her, he knew they had to break up. On August 3rd 2015, he moved to Watersman, California. He made some friends in his new school, including Nia Toadstool, Lexi Reed, and Dominick Klein who he became very close to, and he developed a crush on Nia in his freshman year. In sophmore year, February 2017, Nia and Gregory went to the Valentine's Day dance where they became a couple. During the course of high school, he took up weight-lifting and became more muscular.
Later, when Nia and Gregory returned to Watersman in 2024 after college, they learned that Nia's parents moved out of Nia's childhood home. Since it was so old, the city had demolished it and built a newer one. Nia and Gregory bought it. In 2025 Nia and Gregory get married. Later, in 2027, Nia and Gregory have their first daughter Melody Brandt.
Gregory's first appearance was in After Sims 3, On his first day of school, September 4th 2015, he was a little afraid to make new friends at this school. There was an assembly for the freshmen. The principal assigned groups, he was in the same group with Nia. When the principal paired people up for the tour of the school, he was paired up with Nia Toadstool. He began to watch a TV show on his phone, Nia also liked the show too, and they became friends.
Later, Astrid arrived to the high school for Nia. She needed help with finding the flash drive because she left it in Nia's bedroom. Gregory wants to come with them and help. When they arrive to Nia's house, they begin to search for the flash drive. When Gregory found it, Astrid was about to leave, but Nia wanted to enter the time to see her Sims again. They transport into the game and Gregory couldn't believe it.
Then, they go to the Hall household where Fiona plans to throw a party, but Gorda comes over and it's revealed she is Mav and Fiona's grandmother. With her revenge, she sends Nia, Gregory, and Astrid into a "Sims torture chamber," a basement with no lights, no beds, bathrooms, or showers or any survival things and they make the Sims die. Nia and Gregory tried to escape by hugging, like Astrid and Nia did before, but it didn't work and just resulted in some awkwardness between the two.
Gregory was going to confess to Nia something but was interrupted by Nia's uncle Jebidah going to the game and tried to get them out. They were out of the game suddenly, but they noticed that Jeb had been hit by a frying pan. They slowly walked downstairs and saw Gorda hit Lexi with it too. Nia sneaks up and knocked her out. Then they send her back into the game, and she's never seen again. Gregory then went home, and decided that he was really going to like this place. The next day, in school, Gregory and Nia meet up she asked about what Gregory was going to confess but he covered it up.
In this story, it's 2020 and Nia and Gregory are going to college. It's revealed that Nia and Gregory are now dating. Nia learned she was accepted to Montana University, and so was her boyfriend Gregory. So they took a plane ride to Montana where Nia's uncle and aunt let them live in the guest bedroom while they were there attending the university.
However, when Nia tries to enter The Sims 4, like she had done with Sims 3 five years prior, she accidentally creates an alternate universe where Astrid and Nia never entered the game, resulting in a very different life for herself.
The next morning, Nia woke up and saw that Gregory had disappeared all of his things were gone as well. She called him, but alternate-Gregory assumed that it was a prank phone call. In this universe Gregory and Nia had never became friends because they never went on the adventure here. Later Gregory visits Nia's parents' house where he tells them that Nia prank called him. Nia gets a memory of Gregory says "listen Nia, you're really nice, but I'm not interested in having friends right now..." during the events of After Sims 3. Nia had another flashback. This time it was in the Valentine's Day dance where she was supposed to fall in love with Gregory... She envisioned herself alone and sad. Her friend Lexi was comforting her because she was lonely.
Gregory is seen later after Nia restores the timeline. Nia learns that Gregory had an ex-girlfriend named Kaycee and he kept it a secret for this whole time. But she forgives him, then they kissed.
- Astrid is the reason that Gregory and Nia got together.
- His favorite color is red and most of his outfits have red on them somewhere.
- He has very high logic and athletic skill in game.
- Like Nia, he has no siblings.
- His mom is Argentinan and his dad is Latino.