How to snap/round gradient rotation and stops?

Figured that out. RTFM.

thisDocument = app.activeDocument;
docSelection = thisDocument.selection;
selectionLen = docSelection.length;
for (i = 0; i < selectionLen; i++) {
    oldFill = docSelection;
    if (oldFill.typename == "PathItem" || oldFill.typename == "CompoundPathItem") {
        checkPath = oldFill;
        if (oldFill.typename == "CompoundPathItem") {
            checkPath = oldFill.pathItems[0];
        }
        if (checkPath.filled == true && checkPath.fillColor.typename == "GradientColor") {
            if (checkPath.fillColor.gradient.type == GradientType.LINEAR) {
                //make rotation multiple of 5
                var angleVal = prompt("Make angle of gradients to be multiple of:","5","Gradient Angle")
                var oldAngle = checkPath.fillColor.angle;
                var newAngle = (Math.round(oldAngle / angleVal)) * angleVal;
                var angleDiff = newAngle - oldAngle;
                oldFill.rotate(angleDiff, 0, 0, 1, 0);
                //make stops position at multiple of 5
                var stopVal = prompt("Make gradient stops position at multiple of:","5","Gradient Stops")
                var numOfStops = checkPath.fillColor.gradient.gradientStops.length;
                for (k = 0; k < numOfStops; k++) {
                    var oldRamp = checkPath.fillColor.gradient.gradientStops.rampPoint;
                    var newRamp = (Math.round(oldRamp / stopVal)) * stopVal;
                    checkPath.fillColor.gradient.gradientStops.rampPoint = newRamp;
                }
            }
        }
    }
}