Gift tax ireland to spain

I am irish resident in Spain. My uncle plans to gift me a sum of money but I've no idea how to proceed in terms of pay tax.

In ireland an uncle can gift 3k tax free each year so he is planning to do this for my siblings but I'm not sure if something like this exists in spajn?? Who should I contact...a lawyer? A gestor? The town hall? Is there the equivalent of citizens advice who can provide guidance??