The post immediately caught the attention of various agencies and spurred a full-blown investigation.
"We have gotten a lot of tips, we've gotten tips from various sources and the National Center for Missing and Exploited Children,” said GBI spokeswoman Sherry Lang.
Authorities are also looking into whether the ad is a prank.
"That would be something we would take to the district attorney's office and let the DA make a determination on that," Lang said. “We are not sure whether or not it's a hoax, but it's a definite possibility."
The GBI says if this is a hoax, it's still unclear what, if anything the person could be charged with.
WSB-TV has received several messages on our Facebook page about the post.