| PASS | Default grid-column-gap is 'normal' | |
| PASS | grid-column-gap accepts pixels | |
| PASS | grid-column-gap accepts em | |
| PASS | grid-column-gap accepts vw | |
| PASS | grid-column-gap accepts percentage | |
| PASS | grid-column-gap accepts calc() | |
| PASS | grid-column-gap accepts calc() mixing fixed and percentage values | |
| PASS | Initial grid-column-gap is 'normal' | |
| PASS | Initial grid-column-gap is 'normal' 2 | |
| PASS | Initial inherited grid-column-gap is 'normal' | |
| PASS | grid-column-gap is inheritable | |
| PASS | Negative grid-column-gap is invalid | |
| PASS | 'max-content' grid-column-gap is invalid | |
| PASS | 'none' grid-column-gap is invalid | |
| PASS | grid-column-gap with multiple values is invalid | |
| PASS | Angle grid-column-gap is invalid | |
| PASS | Resolution grid-column-gap is invalid | |
| PASS | Time grid-column-gap is invalid | |