Definition of GBAY according to Urban Dictionary:
A fictitious place to buy and sell stolen merchandise.
To admit that you have stolen something.
To give you more insight as to the character and demeanor of Gbayemporium, here are a mere few screenshots. With permission from the authors.
Below is a link to yet another encounter I found on the World WIDE Web.
http://www.artofthemix.net/forums/ShowPost.aspx?PostID=961