[Solved]-Highcharts gauges not working in IE8-Highcharts

On your plotBands section of code you have a dangling comma:

plotBands: [{
                from: 0,
                to: " . $junior_sum .",
                color: '#009FF5' // dark blue
            }, {

                from: " . $junior_sum . ",
                to: 25,
                color: '#92CFF0' // light blue

            }, //here is your dangling comma

            ]

IE does not take kindly to those. Since do not list your actual js with data the if statements do not parse but I would check there also for invalid syntax. If possible put up a jsFiddle of what the js looks like for the chart once it has been parsed by PHP.