The Confederación General del Trabajo (CGT) as a whole announced to support the call for Global May Day 2021. Local branches of the anarcho-syndicalist CGT arranged different activities across Spain.
Here is a small selection:
In Córdoba the CGT together with the local CNT and others arranged a rally.
Besides a May Day rally in the city center, the CGT in Madrid arranged a 2 hours long concert and streamed it online.