[9] On 7 November 2023, Santos was signed by the Golden State Warriors to a three-year deal[10] and throughout the next two seasons, he was assigned several times to Santa Cruz.

[11][12] On January 15, 2025, Santos made his first career start, tallying 5 points, 3 assists, and 7 rebounds in a 116-115 victory over the Minnesota Timberwolves.

[13] Santos helped Brazil win a gold medal at the 2019 FIBA South America Under-17 Championship in Chile.

[3] Gui Carvalho was one of the Brazilian representatives at Basketball Without Borders, a camp held by FIBA and the NBA that brought together 64 prospects from Latin America for training sessions in the city of Medellín (Colombia), and also at the FIBA Americas Youth Elite Camp, that happened in Campinas, Brazil at the end of 2018.

[3] Gui recalls that especially the support of Minas teammates Alex Garcia and Leandro Barbosa helped him shape his game and reach success.