RJ and JR. have been involved in a total of 15 gu sets, but only 3 are with just the 2 players. One is the card in this thread, the other only has a RJ gu and the last is a dual gu/au card.
Card 2001 SPx Winning Materials Jersey Duos #KGRJ Griffey Jr./ Johnson AS Mem, S# Print Run
Card 2004 Fleer Genuine Insider Classic Confrontations Swatch #RJ2 R.Johnson Jsy w/ Griffey Jr. Mem, S# Print Run
Card 2004 Ultimate Collection Dual Materials Signature #JG Randy Jsy/ Griffey Jr. Jsy Mem, AU, S# Print Run