Guilherme Torres made his Série A debut on 23 June 2012, playing the full 90 minutes in a 1–0 home win against São Paulo.
[7] Eager to build on his progress and keep developing, Guilherme Torres had an excellent season in La Liga, although he was unable to prevent Deportivo from suffering relegation.
Unwilling to take a step down to the Segunda Division, the midfielder searched for a way out from the Spanish club, finally sealing a transfer to Greek giants Olympiacos.
On 17 August 2018, Guilherme Torres signed a three years contract with Superleague club Olympiacos after completing a €3 million transfer fee.
[8] On 31 March 2019, he scored with a header his first goal for the championship from close range to convert Kostas Fortounis’s cross, in a 2–1 home win game against Atromitos.