- Best World Amateur Golf Ranking: 140
- 2023 World Amateur Golf Ranking: 1354
- 2023 Won the Big Texan with scores 68-71-72
- 2022 3rd place finish at the Herb Wimberly Intercollegiate with scores of 69-71-69
- 2022 10th place finish at the Hovas Open with scores of 69-70-74
- 2021 8th place finish at Lindbytvatten Grand Opening, More Golf Mastercard tour with scores of 74-70-71
- 2020 6th place finish at V Sport Golf Challenge at PGA Sweden National, More Golf Mastercard tour with scores of 70-68-69
- 2020 Won PGA Junior Open with scores of 68-70
- 2020 11th place finish African Amatuer Storke Play Championship with scores of 70-76-73-75
- 2020 Silver medal at European Amateur Team Championship, Hilversumsche Golf Club
- 2019 6th place finish at Toyota Junior World Cup with scores of 66-66-70-71
- 2019 Bronze medal at the European Boys Team Championship, Golf de Chantilly
- 2019 Won the Stenson Sunesson Junior Challenge with scores of 78-70-73
- 2019 3rd place finish at the Allianz German Boys with scores of 74-67-66
- 2018 5th place finish at the British Boys Amateur Championship with scores of 76-73
- 2018 2nd place finish at the Duncan Putter with scores of 76-66-69
- 2018 Bronze medal at the European Boys Team Championship, Golf Resort Kaskada Brno
Wallor on Andersson - "We are excited that Gustav has made the decision to become part of the UCF Men's Golf program. He is a very talented and physically gifted player that we believe can come in and make an impact on our program. He brings with him a great deal of national junior and national amateur playing experience, as well as winning at the collegiate level. We are looking forward to Gustav joining our program as we move into the Big 12 Conference."