Legacy TypoScript Rendering 

This is the default TypoScript setting provided while including the legacy Gridelements setup in your TS template editor:

lib.gridelements.defaultGridSetup {
    // stdWrap functions being applied to each element
    columns {
        default {
            renderObj = COA
            renderObj {
                # You can use registers to e.g. provide different image settings for each column
                # 10 = LOAD_REGISTER
                20 =< tt_content

                # And you can reset the register later on
                # 30 = RESTORE_REGISTER
            }
        }

        #2 < .default
        #2 {
        #}
    }

    # if you want to provide your own templating, just insert a cObject here
    # this will prevent the collected content from being rendered directly
    # e.g. cObject = TEMPLATE or cObject = FLUIDTEMPLATE will be available from the core
    # the content will be available via field names like
    # tx_gridelements_view_columns (an array containing each column)
    # or tx_gridelements_view_children (an array containing each child)
    # tx_gridelements_view_column_123 (123 is the number of the column)
    # or tx_gridelements_view_child_123 (123 is the UID of the child)
}

tt_content.gridelements_pi1 = COA
tt_content.gridelements_pi1 {
    #10 =< lib.stdheader
    20 = COA
    20 {
        10 = USER
        10 {
            userFunc = GridElementsTeam\Gridelements\Plugin\Gridelements->main
            setup {
                default < lib.gridelements.defaultGridSetup
            }
        }
    }
}

tt_content.gridelements_view < tt_content.gridelements_pi1

lib.tt_content.shortcut.pages = COA
lib.tt_content.shortcut.pages {
    5 = LOAD_REGISTER
    5 {
        tt_content_shortcut_recursive.field = recursive
    }

    10 = USER
    10 {
        userFunc = GridElementsTeam\Gridelements\Plugin\Gridelements->user_getTreeList
    }

    20 = CONTENT
    20 {
        table = tt_content
        select {
            pidInList.data = register:pidInList
            selectFields.dataWrap = *,FIND_IN_SET(pid,{register:pidInList}) AS gridelements_shortcut_page_order_by
            where = colPos >= 0
            languageField = sys_language_uid
            orderBy = gridelements_shortcut_page_order_by,colPos,sorting
        }
    }

    30 = RESTORE_REGISTER
}

tt_content.shortcut.variables.shortcuts {
    tables := addToList(pages)
    conf.pages < lib.tt_content.shortcut.pages
}
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As you can see, it is just based on the usual TypoScript and uses some internal keys, like columns, default and renderObj to define the setup for the columns. Anything else you want to use will be based on the official TypoScript syntax, so no extension-specific parameters are involved.

As described in the commented part, you will find some additional virtual fields in your data, containing data gathered during the rendering process. These come in handy, when you want to use a TEMPLATE or FLUIDTEMPLATE element to produce your output. Just use the debug view helper in your template to get an overview of the available fields.

<f:debug>{_all}</f:debug>
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Any of the internal keys and the default settings will of course be passed to the stdWrap method, so you can assign almost anything to any part of your setup.

The two setups for the shortcut cObject are used to render the references properly, so changing them should be done only with a clear understanding of their effect.

See Reference for the full list of internal keys and virtual fields this rendering path provides.