179버전에서는 checkbox에서 decode가 지원되지 않습니다.
아래 문의해주신 내용과 같이 컴포넌트 업그레이드를 받으시면 해결될것같습니다.

>게시판을 이용해 주셔서 감사합니다.
>다음양식에 맞게 입력해주세요.
>
>* 고객시스템명 :
>* GAUCE 버전 :
>* WAS 종류(WebLogic 등등) :
>* DB 종류 :
>* 문의 유형(질문/요청/참조) :
>* 내용 :
>
>그리드의 버전은 1,1,1,179입니다.
>
>소스입니다.
><object name="AUTH_GD" id="AUTH_GD" classid="<%=GauceConstants.GRID_CID%>" style="width:270; height:110px;">
>                                                        <param name="DataID"                 value="AUTH_DS">
>                                                        <Param Name="AutoResizing"           value=false>
>                                                        <param name="ColSizing"                        value=false>
>                                                        <Param Name="SortView"                     value=false>
>                                                        <Param Name="ColSelect"                   value=false>
>                                                        <Param Name="UsingOneClick"     value=true>
>                                                        <Param Name="Editable"                   value=true>
>                                                        <param name="Format"                 value="
>                                                        <c> id=USER_ID              name=USER_ID        width=50        align=center        edit=none show=false </c>
>                                                        <C> id=AUTH_ENB                        name=Enable                width=100</C>
>                                                        <c> id=AUTH_CHK         name=선택                width=50        align=center        EditStyle=CheckBox edit={decode(AUTH_ENB,0,'true','false')}</c>
>                                                        <c> id=AUTH_CODE        name=권한코드                width=70        align=left                maxlength=20 edit=none </c>
>                                                        <c> id=AUTH_NM                name=권한명                width=120        align=left                maxlength=20 edit=none</c>
>                                                        ">
>                                                </object>