Guillermo "Guille" Méndez Pereiro (born 31 January 1992) is a Spanish footballer who plays for CD Praviano as a forward.
Méndez was born in San Esteban de Pravia, Asturias.
A product of Sporting de Gijón's prolific youth academy, Mareo, he made it to the B-team during the 2010–11 season at the age of 18, with the side playing in the third division.
Méndez made his first-team – and La Liga – debut on 21 November 2010, entering the pitch in the 81st minute of a 0–1 away loss against CA Osasuna.
In January 2012, Méndez moved to neighbouring Marino de Luanco (third level), on loan until end of the campaign.