Can I buy gift cards at the post office?

Excuse me, I was wondering if you could clarify something for me. I've heard that some places offer the option to purchase gift cards, and I was wondering if the post office is one of those places. Specifically, I'm interested in knowing if I can buy gift cards at the post office. Is this a service that they offer, or is it something that I would need to look into at a different location? I appreciate your help in clarifying this for me.