How to disable a <g:submitToRemote/> button
<!-- Whatever you have before your g:submitToRemote button-->
    <g:checkBox name="myCheckBox" />
    <g:submitToRemote name="myButton" />
    <!-- Whatever you have after your g:submitToRemote button-->

    <!-- Some jQuery to disable the button at the end of your document-->
    <g:javascript>
        $(document).ready(function() {
            $("#myCheckBox").change(function{
                // myButton is disabled if myCheckBox is checked
                if($("#myCheckBox").prop("checked")){
                    $("#myButton").attr("disabled", "disabled");
                }
                else{
                    $("#myButton").removeAttr("disabled");
                }
            });
        });
    </g:javascript>
</body>
</html>