Can reference grid labels be exported to an attribute table in ArcGIS Pro?

Answer

No, reference grid labels in a page layout cannot be exported to the attribute table of a feature layer. Reference grids must be converted to a feature layer before any advanced editing or placement can be done. However, converting to a feature layer is only possible with graticules, measured grids, and MRGS grids. Refer to ArcGIS Pro: Convert grids to features for more information. Alternatively, a grid index feature layer can be created from a customized fishnet layer, essentially serving as a reference grid layer. This layer can then be joined and merged with a feature layer to add the index values to the attribute table.

Note:
This workflow requires a polygon feature layer. If working with enclosed line features, convert them to polygons using the Feature To Polygon tool.

1. Open the ArcGIS Pro project.

Note:
For instructions to find and use the geoprocessing tool, refer to ArcGIS Pro: Find a geoprocessing tool.

2. Create a fishnet of rectangular cells using the Create Fishnet tool with the following configuration settings.
   1. In the Create Fishnet pane, for Output Feature Class, specify a name and location.
   2. For Template Extent, define the desired extent of the fishnet to match the map extent.
   3. For Number of Rows, specify the total number of fishnet rows.
   4. For Number of Columns, specify the total number of fishnet columns.
   5. Define Geometry Type for the output feature layer as Polyline or Polygon.
   6. Click Run.
3. Create polygon index features using the Grid Index Features tool with the following configuration settings.
   1. For Output Feature Class, specify a name and location.
   2. For Input Features, select the output feature layer from Step 2 in the drop-down list.
   3. For Number of Rows and Number of Columns, set the same total number of rows and columns as specified in Step 2.
   4. Check the Start labeling from the Origin check box.
   5. Click Run.
4. Join attributes between the newly created polygon index features and the polygon feature layer using the Spatial Join tool. Select the output feature layer in Step 3 for Target Features and the polygon feature layer for Join Features.
5. Create a grid map within the polygon feature layer by merging the output from Step 4 with the polygon feature layer using the Merge tool.
6. Display grid map labels based on the attribute table values. For instructions, refer to ArcGIS Pro: Turn on labels.

The image below shows the attribute-based reference grid labels displayed on the map.