Need Help with paint code

My 72 Duster is painted a light yellow on firewall and door jams. The exterior of the car has been repainted and to me it looks tan. I suppose this color could be called, gold, yellow or tan.
Paint code on fender tag is GY4. I know Y1 was lemon twist but I was told this car is just yellow. Anyone know what GY4 was called??

http://i12.photobucket.com/albums/a207/fore-speed/KGrHqFnsFGzcK5McwBRtf-FlUQ60_3.jpg