Hello,

If you mean this:

Then in the groupHeaders -> titleText, Where you specify header text, you can append <img> tag.

$g->set_group_header( array(
		"useColSpanStyle"=>false,
		"groupHeaders"=>array(
			array(
				"startColumnName"=>'name', // group starts from this column
				"numberOfColumns"=>2, // group span to next 2 columns
				"titleText"=>'<img src="https://domain.com/Photos-new-icon.png" style="top: 3px;position: relative;margin-bottom: -5px;margin-right: 5px;" height="30" />Personal Information'
			)
	)
)