Overview
GDKing is a Valheim world location that spawns in the black forest biome, identified internally as GDKing. World generation places up to 4 per world, with terrain constraints (distance 1000- 7000, max delta 5), and an exclusion radius of 25m, which is why some seeds have far more of them than others. The data tags it as prioritized.
About
GDKing is The Elder's Forsaken Altar in the Black Forest. Three Ancient seeds dropped by Greydwarves are placed on the central stone to summon Valheim's second boss.