gravityflow_post_process_workflow
Fires at the conclusion of processing any workflow step. If you want your action to only fire when the workflow is complete, use gravityflow_workflow_complete.
add_action('gravityflow_post_process_workflow', 'my_workflow_post_process_function', 10, 4); function my_workflow_post_process_function( $form, $entry_id, $step_id, $starting_step_id ) { // Replace your Form ID if ( $form['id'] == 123 ) { // do stuff } }