gform_activate_user

add_action( 'gform_activate_user', 'your_function_name', 10, 3 );

add_action( 'gform_activate_user', 'after_user_activate', 10, 3 );
function after_user_activate( $user_id, $user_data, $signup_meta ) {
	// Add note to entry.
	GFFormsModel::add_note( $signup_meta['entry_id'], $user_id, 'admin', 'The user signup has completed for ' . $user_data['display_name'] . '.');
}

add_action( 'gform_activate_user', function( $user_id, $user_data, $signup_meta ) {
	// Delete the entry.
	GFAPI::delete_entry( $signup_meta['entry_id'] );
	GFCommon::log_debug( __METHOD__ . '(): Entry deleted after user activation, ID: ' . $signup_meta['entry_id'] );
}, 10, 3 );

add_action( 'gform_activate_user', function( $user_id, $user_data, $signup_meta ) {
	$entry = GFAPI::get_entry( rgar( $signup_meta, 'entry_id' ) );
	// Get the ID for posts created using the APC add-on.
	$created_posts = gform_get_meta( $entry['id'], 'gravityformsadvancedpostcreation_post_id' );

	// If there are no posts return without action.
	if ( empty( $created_posts ) ){
		gf_user_registration()->log_debug( "No posts founds for user ID {$user_id}" );
		return;
	}

	// Change the post status for any posts created by this user using the APC add-on.
	foreach ( $created_posts as $post ){
		// Set the post status to publish.
		$post_status = 'publish';

		wp_update_post(
			array(
				'ID'          => $post['post_id'],
				'post_status' => $post_status,
			)
		);
		gf_user_registration()->log_debug( "Changed post status for post ID {$post['post_id']} to {$post_status}" );
	}
}, 10, 3 );