ΔE 13.7, fair: the same colour family, but not a straight swap. Gypsum White is noticeably lighter, more muted than Shark White.
Only where an exact match doesn’t matter, such as a new unit or a highlight. Fair match (ΔE 14). Gypsum White is noticeably lighter, more muted than Shark White.
The same difference applies the other way round: Shark White is noticeably darker, more saturated.
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 Shark White on the colour wheel See Gypsum White on the colour wheel
All matches: Shark White equivalents · Gypsum White equivalents