ΔE 18.9, loose: different enough that you should pick on purpose. Green Gold is a little darker, much more muted, warmer than Ghillie Dew. They are different kinds of paint: Army Painter Ghillie Dew is a one-coat contrast-style paint and Golden Green Gold is an opaque base/layer paint, so they won’t behave the same on the model even where the colour is close.
Not as a straight swap; see the closer alternatives below. Loose match (ΔE 19). Green Gold is a little darker, much more muted, warmer than Ghillie Dew. They are different kinds of paint.
The same difference applies the other way round: Ghillie Dew 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 Ghillie Dew on the colour wheel See Green Gold on the colour wheel
All matches: Ghillie Dew equivalents · Green Gold equivalents