ΔE 12.4, fair: the same colour family, but not a straight swap. Light Green (Blue Shade) is a little lighter, more saturated, cooler than Gauss Green.
Only where an exact match doesn’t matter, such as a new unit or a highlight. Fair match (ΔE 12). Light Green (Blue Shade) is a little lighter, more saturated, cooler than Gauss Green.
The same difference applies the other way round: Gauss Green is a little darker, more muted, warmer.
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 Gauss Green on the colour wheel See Light Green (Blue Shade) on the colour wheel
All matches: Gauss Green equivalents · Light Green (Blue Shade) equivalents