I know (at least I don't think so) that the GMCs were not available with the 1968 50th anniversary package but I think there is a few that were ordered with "special paint" that is the same. Like my suburban..
Curious if anyone else has or seen a 68 gmc with the same special paint my code on the spid is 01001KG SPECIAL PAINT
It has fawn interior like all 50th chevy suburbans had but the metal is white not gold.