The grid-column-end CSS property is used in grid layouts to specify the ending position of a grid item along the horizontal axis.

The grid-column-end property accepts a value that represents the grid line at which the grid item should end. Grid lines can be identified using line numbers, names of named grid lines, or the span keyword to span across multiple grid tracks.

Here’s an example:

.grid-item {
  grid-column-end: span 3;

In this example, the grid-column-end: span 3; rule sets the grid item to span across three grid tracks horizontally. This means the grid item will end at the third grid line from its starting position.

The grid-column-end property works in conjunction with grid-column-start to define the horizontal range of grid placement for grid items within a grid container. It provides flexibility in specifying the positioning and spanning of grid items in a grid layout.