SectionField
A form can be split up in to multiple sections. These sections actually are fields, and they CAN be exported. But by default the plugin disables this. This class is responsible for fixing that. There is a setting in the plugin settings page to enable / disable these columns.
Filters
gfexcel_field_section_enabled_{form_id}
This filter can help you by programmatically enable or disable the section columns.Example
add_filter('gfexcel_field_section_enabled', '__return_false');