ΔE 24.3, loose: different enough that you should pick on purpose. Green Gold is a little darker, much more muted, warmer than Gladeshard.
Not as a straight swap; see the closer alternatives below. Loose match (ΔE 24). Green Gold is a little darker, much more muted, warmer than Gladeshard.
The same difference applies the other way round: Gladeshard is a little lighter, much more saturated, cooler.
ΔE is the colour difference between our two swatch estimates: under about 6 is close, over about 15 is loose. Real paints also differ in finish, coverage and how they thin, so test before you commit.
See Gladeshard on the colour wheel See Green Gold on the colour wheel
All matches: Gladeshard equivalents · Green Gold equivalents