Gap attribute is not Grid exclusive (draft)
gap (grid-gap) - CSS: Cascading Style Sheets | MDN (mozilla.org)
https://developer.mozilla.org/en-US/docs/Web/CSS/gap
Is applicable to flex
gap (grid-gap) - CSS: Cascading Style Sheets | MDN (mozilla.org)
https://developer.mozilla.org/en-US/docs/Web/CSS/gap
Is applicable to flex