TM has GA 92 ending at US 19/41 north of Griffin, but I can't find any evidence of this. As far as I can tell, GA 92 still continues down US 19/41 and then Business 19/41 into downtown Griffin to end at GA 16 as it has for decades. GDOT's most recent Spalding County map shows this, though it is admittedly from 2013. GSV still shows GA 92 signed as such as of 2016.
GMSV, as of September 2018 shows the following
* GA 92 southbound approaching US 19/41: no signage for GA 92 turning south
* GA 16 eastbound approaching US 19/41: no signage for GA 92
* US 19/41 southbound before GA 92: GA 92 both south and west from intersection.
* US 19/41 southbound after GA 92: GA 92 SOUTH sign
Is it signed? Sure. Can a driver follow it? Maybe? Will put it on my to-check list.