How much is a GDC dollar?

Excuse me, I was wondering if you could clarify something for me. I've been hearing about this GDC dollar, and I'm curious to know its current value. I understand that the price of cryptocurrencies can fluctuate quite a bit, but I'm hoping to get a general idea of what one GDC dollar is worth right now. Is there a specific exchange rate or market value that I can reference to get an accurate understanding of its worth? Thank you in advance for your help.