Tuffwinder - I know!
The Dekker's, who used to own Guaranteed Gold, had several foals born by GG out of chestnut mares that had dark chestnut manes and tails and their bodies were dark chestnut as well. They often said if it wasnt them doing the actual breeding 342 days ago, they'd swear the stallions had been changed! And those foals did mature into very very dark golden palomino's as well
GG has several APHA foals. Out of both APHA dams and out of TB dams that are dual registered as Paints with the APHA. But I know for 100% certain, this is is first Appy foal ...He does have a Paint foal, though!