Born and raised in São Paulo, Bortoleto began competitive kart racing aged seven, winning multiple national titles and graduating to junior formulae in 2020.

[6] He remained in karts until 2019, with his most successful year being 2018, where he finished third in the European and World Championships in OK-Junior, and became vice-champion in both the WSK Super Master Series and the Andrea Margutti Trophy.

[7] Bortoleto made his car racing debut in the 2020 Italian F4 Championship, partnering Sebastián Montoya, Gabriele Minì and Dino Beganovic at Prema Powerteam.

[citation needed] In March 2021 it was announced that Bortoleto would be making his debut in the Formula Regional European Championship with FA Racing, run by MP Motorsport.

[13] While Bortoleto suffered with engine problems at times during the year, he manged to win at Spa, inheriting victory after teammate Hadrien David was penalised, and at Barcelona.

[17] At the end of September, Bortoleto participated in the 2022 FIA Formula 3 post-season test at Jerez with Trident, partnering Oliver Goethe and Leonardo Fornaroli.

Having been elevated to an early championship lead, the Brazilian extended it at Albert Park by claiming pole position and a second consecutive feature race victory.

[23] As Paul Aron and Pepe Martí missed out on pole position during Monza qualifying, Bortoleto was crowned FIA Formula 3 champion on Friday.

[24] Bortoleto entered Formula 2 for his 2024 campaign, joining Invicta Virtuosi Racing alongside Alpine Academy driver Kush Maini.

[30] Though he fell down to fourth at the start of Sunday's event, Bortoleto moved back to second after the pit stop phase; he chased down Hadjar but could not pass him before the race ended, claiming his first podium in F2 with second place.

[34] On Sunday, Bortoleto passed race leader Joshua Dürksen on lap 4 and later overtook Martí, who had jumped him by pitting during a virtual safety car, to claim his maiden F2 victory and enter the top three in the championship.

[35][36] He progressed further with two points results at Silverstone but was penalised again due to a battle with Maini, this time being demoted from third to fourth after a last-lap overtake was judged to have happened off-track.

[41] In the sprint race, Bortoleto charged through to eighth, sharing the final point with Dennis Hauger after crossing the finish line in a dead heat.

[57] Furthermore, McLaren team principal Andrea Stella revealed he would allow Bortoleto to leave their academy for Sauber if needed, praising him for his performances in his junior career.

[59] Sauber confirmed this on 6 November 2024, announcing that Bortoleto would partner Nico Hülkenberg on a multi-year deal from 2025 onwards; the two will replace outgoing duo Valtteri Bottas and Zhou Guanyu.

2010  E. Gutiérrez 2011  V. Bottas 2012  M. Evans 2013  D. Kvyat 2014  A. Lynn 2015  E. Ocon 2016  C. Leclerc 2017  G. Russell 2018  A. Hubert 2019  R. Shwartzman 2020  O. Piastri 2021  D. Hauger 2022  V. Martins 2023  G. Bortoleto 2024  L. Fornaroli 2005  N. Rosberg 2006  L. Hamilton 2007  T. Glock 2008  G. Pantano 2009  N. Hülkenberg 2010  P. Maldonado 2011  R. Grosjean 2012  D. Valsecchi 2013  F. Leimer 2014  J. Palmer 2015  S. Vandoorne 2016  P. Gasly 2017  C. Leclerc 2018  G. Russell 2019  N. de Vries 2020  M. Schumacher 2021  O. Piastri 2022  F. Drugovich 2023  T. Pourchaire 2024  G. Bortoleto