You can set link formatter to any column, and pass the ID or similar field to other url using {field} placeholder in url.
Refer demos/appearance/external-link.php

$col = array();
$col["title"] = "Client";
$col["name"] = "name";
$col["width"] = "100";
$col["search"] = true;
$col["editable"] = true;
$col["export"] = false; // this column will not be exported

// link e.g. http://domain.com?id={id} given that, there is a column with $col["name"] = "id" exist
$col["link"] = "http://google.com/?id={id}";
$col["linkoptions"] = "target='_blank'"; // extra params with <a> tag

$cols[] = $col;

Ok, Would have to work; But what about security to ensure clicking from form and not external?

session vars maybe better…

Thanks!

You can use $_SERVER["HTTP_REFERER"] condition on target page to ensure it's clicked from grid.