Issue
Columns for Gravity Forms Multiple Choice fields show the correct header but an empty value for every entry, both in the entries list table and in the Admin Columns export. Single-input fields on the same form (Radio, Select, Text) are fine.

Steps to reproduce
Add a Multiple Choice field to a Gravity Forms form, set to allow multiple selections.
Submit a few entries with different choices selected.
Add a column for that field in Admin Columns.
View the entries list, and run the Admin Columns export.
Expected: the selected choices, as shown for a classic Checkboxes field. Actual: empty for every entry. Header is correct.

Notes
Gravity Forms’ own entry export outputs the values correctly, so this looks specific to the Admin Columns integration.
The same form and the same entries export correctly under Admin Columns Pro 6.4.20, which suggests a regression in 7.x.
The failure is silent — the header is right and the export completes, so an incomplete export is easy to miss.

Happy to provide the form export or any debug output that would help.