•  Live Interlace Gap (between shape/objects, not only between text letters)

Thanks,
In the meanwhile, I made a small script… Works also for me…  :-)

 

/**********************************************************

LIVE_INTERLACE_GAP_DC.jsx — V1.0
BY: Dimitri Castrique aka the.bend

Script equivalent of the "LiveInterlaceGap" action:
  1. Group the selected objects
  2. Effect > Pathfinder > Trim          (live)
  3. Effect > Path > Offset Path  -1 mm  (live)

/!\ VERIFY after first run: in the Appearance panel,
    "Trim" must sit ABOVE "Offset Path" (effects run top → bottom).
    If Offset Path lands above Trim, the result is wrong
    (shapes shrink BEFORE trimming → no gap).

**********************************************************/

#target Illustrator

var OFFSET_MM_DC        = -1;   // Each shape shrinks by this → total gap = 2 × |value|
var JOIN_TYPE_DC        = 2;    // 0 = Round, 1 = Bevel, 2 = Miter
var MITER_LIMIT_DC      = 4;

function convertMillimetersToPoints_DC(mm_DC) {
    return mm_DC * 72 / 25.4;
}

function buildOffsetPathEffectXML_DC(offsetPt_DC, joinType_DC, miterLimit_DC) {
    return '<LiveEffect name="Adobe Offset Path"><Dict data="' +
           'R mlim ' + miterLimit_DC +
           ' R ofst ' + offsetPt_DC +
           ' I jntp ' + joinType_DC +
           ' "/></LiveEffect>';
}

function applyLiveInterlaceGap_DC() {
    if (app.documents.length === 0) {
        alert("No document is open.", "LiveInterlaceGap");
        return;
    }

    var doc_DC = app.activeDocument;

    if (!doc_DC.selection || doc_DC.selection.length === 0 || doc_DC.selection.typename === "TextRange") {
        alert("Please select the objects to interlace.", "LiveInterlaceGap");
        return;
    }

    try {
        // 1. Group
        app.executeMenuCommand("group");

        // 2. Effect > Pathfinder > Trim (live, same as the Effect menu item)
        app.executeMenuCommand("Live Pathfinder Trim");

        // 3. Effect > Path > Offset Path (live)
        var group_DC    = doc_DC.selection[0];
        var offsetPt_DC = convertMillimetersToPoints_DC(OFFSET_MM_DC);
        group_DC.applyEffect(buildOffsetPathEffectXML_DC(offsetPt_DC, JOIN_TYPE_DC, MITER_LIMIT_DC));

        app.redraw();
    } catch (e_DC) {
        alert("LiveInterlaceGap error:\n" + e_DC.toString(), "LiveInterlaceGap");
    }
}

applyLiveInterlaceGap_DC();

Making a graphic style does not work?

It would help if you could just post screenshots of the Appearance panel and layers panel instead of having us read through this Chat GPT output.