saving custom guides in Photoshop

Its probably too late but if this problem still exset in PS, you can use My script, It will save the guides into a text file (also editable) and if you need to transfer to new file you can use the same script:

#target photoshop

// Create the user interface
var dialog = new Window('dialog', 'Guide2Text');
dialog.alignChildren = 'center';

// Save Guides Button
var saveBtn = dialog.add('button', undefined, 'SaveGuides');
saveBtn.onClick = function() {
    saveGuides();
};

// Insert Guides Button
var loadBtn = dialog.add('button', undefined, 'InsertGuides');
loadBtn.onClick = function() {
    loadGuides();
};

// Close Button to safely close the dialog
var closeBtn = dialog.add('button', undefined, 'Close');
closeBtn.onClick = function() {
    dialog.close();
};

// Show the dialog
dialog.show();

// Function to save the current guides to a .txt file
function saveGuides() {
    var doc = app.activeDocument;
    var horizontalGuides = [];
    var verticalGuides = [];

    // Collect the horizontal and vertical guides
    for (var i = 0; i < doc.guides.length; i++) {
        var guide = doc.guides[i];
        if (guide.direction == Direction.HORIZONTAL) {
            horizontalGuides.push(guide.coordinate.value);
        } else {
            verticalGuides.push(guide.coordinate.value);
        }
    }

    // Sort guides: vertical guides left to right, horizontal guides top to bottom
    verticalGuides.sort(function(a, b) { return a - b; });
    horizontalGuides.sort(function(a, b) { return a - b; });

    // Build the data string
    var guidesData = [];
    for (var i = 0; i < verticalGuides.length; i++) {
        guidesData.push('V:' + verticalGuides[i]);
    }
    for (var i = 0; i < horizontalGuides.length; i++) {
        guidesData.push('H:' + horizontalGuides[i]);
    }

    // Convert the guidesData array to a string
    var guidesString = guidesData.join('\n');

    // Prompt the user to save the file
    var saveFile = File.saveDialog("Save guides as .txt", "Text Files:*.txt");
    if (saveFile) {
        saveFile.open('w');
        saveFile.write(guidesString);
        saveFile.close();
        alert("Guides saved successfully!");
    }

    // Close the dialog to allow focus to return to Photoshop
    dialog.close();
}

// Function to load and insert guides from a .txt file
function loadGuides() {
    var doc = app.activeDocument;

    // Prompt the user to select the file
    var loadFile = File.openDialog("Select a saved guides file", "Text Files:*.txt");
    if (loadFile) {
        loadFile.open('r');
        var guidesData = loadFile.read();
        loadFile.close();

        // Parse the guides data
        var guidesArray = guidesData.split('\n');

        // Insert guides
        for (var i = 0; i < guidesArray.length; i++) {
            var guideInfo = guidesArray[i].split(':');
            var orientation = guideInfo[0];
            var position = parseFloat(guideInfo[1]);

            // Add the guide to the document
            if (orientation == 'H') {
                doc.guides.add(Direction.HORIZONTAL, new UnitValue(position, 'px'));
            } else if (orientation == 'V') {
                doc.guides.add(Direction.VERTICAL, new UnitValue(position, 'px'));
            }
        }
        alert("Guides inserted successfully!");
    }

    // Close the dialog to allow focus to return to Photoshop
    dialog.close();
}

That's not how guide layouts work, anyway. They define columns and rows, and not arbitrary guides.

This has to be scripted.

https://community.adobe.com/t5/photoshop-ecosystem-discussions/multiple-guide-sets/m-p/3818219

One can »transfer« guides to another file (or rather recreate them) via Script. 

So the questions @Stephen Marsh posed are indeed relevent. 

edit: An example: 

// take guides from active document and add them  to other open documents after removing their existing guides;
// 2013, use at your own risk; 
#target photoshop
if (app.documents.length > 0 && app.activeDocument.guides.length > 0) {main()};
////// function //////
function main () {
// set to pixels;
var myDocument = app.activeDocument;
var originalRulerUnits = app.preferences.rulerUnits;
app.preferences.rulerUnits = Units.PIXELS;
// collect guides;
var theArray = new Array;
for (var m = 0; m < myDocument.guides.length; m++) {
	theArray.push([myDocument.guides[m].coordinate, myDocument.guides[m].direction])
	};
app.preferences.rulerUnits = originalRulerUnits;
// get all open documents;
var theDocs = app.documents;
for (var o = 0; o < app.documents.length; o++) {
	var thisDocument = app.documents[o];
// proceed if not original document;
	if (thisDocument != myDocument) {
		app.activeDocument = thisDocument;
		var originalRulerUnits = app.preferences.rulerUnits;
		app.preferences.rulerUnits = Units.PIXELS;
// remove existing guides;
		for (var n = thisDocument.guides.length-1; n >=0; n--) {
			thisDocument.guides[n].remove()
			};
// add guides;
		for (var p = 0; p < theArray.length; p++) {
			thisDocument.guides.add(theArray[p][1], theArray[p][0]);
			};
		app.preferences.rulerUnits = originalRulerUnits;
		};
	};
};

That's right, as you have discovered, the way to create a guide layout is to use the interface, you can't save existing guides into a guide layout.

Do you need this guide structure for other documents that are the same canvas width and height in pixels?

Or does the position change depending on the canvas size? Such as a relative 10% from the edge rather than a fixed px value?

in the future, to find the best place to post your message, use the list here, https://community.adobe.com/

p.s. i don't think the adobe website, and forums in particular, are easy to navigate, so don't spend a lot of time searching that forum list. do your best and we'll move the post (like this one has already been moved) if it helps you get responses.

<"moved from cc desktop">