It is possible but hardly worth the effort.

Make a gimp-image-hose (gih) brush. Greyscale, repeatable pattern, like this:



Stroke the path using paint tool and emulate dynamics on. Set the brush to suitable size, FG colour etc same as any other brush.



...but then what do you do with the corners

I will attach that brush as an example:

You can fill path with pattern, but You cannot stroke a path with a pattern!

Unless... you are using a plugin (which one is it?) or make that pattern as a brush.

To make that pattern a brush, right click on that pattern (in the pattern dockable dialog) > open as image > Ctrl+A > Ctrl+C > now it's a brush (clipboard)
Select paint brush tool > Go to your brush setting > select this brush(Clipboard), then > Dynamics > Track Direction

Now you can go back to the tab of your main project and > Edit > Stroke the path... > Select paint brush...

Play with the angle of the brush /Spacing / Fade options /Repeat options, ...

I see, thank you. Yes it is also a brush.

I don't think you are going to get a neat result with stroking as it's a wide brush so won't be nicely centred on the picture or have good corners.

If you don't mind doing it manually:
I had a play with tiling the pattern to make a long line of lace:
Filters -> Map -> Tile
Then duplicated it three times, moved it by hand into place rotating the sides:
Layer -> Transform -> Rotate 90 etc.
Finally cut the ends off at 45 degrees to tidy the corners.

in the attachment an explanation how I line my path

[ Image ]

in the attachment an explanation how I line my path

[ Image ]

I cant find this: ' then > Dynamics > Track Direction'

It's in the tools option of the brush, but after reading teapot's solution, I think it's the neatest as you can have very neat corners.
anyway it's always good to know, dynamics
[ Image ]

Yeah i saw that, mine says 'all off' I clicked on it thinking there must be a menu, but no menu. I clicked the pen to the right of it, and there are a bunch of empty boxes, i guess i can pick from. Non of them use that term, direction forward? so yeah

I clicked the icon i dont have track anything, I can type it in the blank, but that does nothing too.

in the attachment an explanation how I line my path

[ Image ]

Have added a green arrow to PixLab's image to show where to click to get the menu.

[ Image ]

yep i clicked there and i do not have that option. its alphabetical and its not in the list, thank you though =)

Have you scrolled right to the bottom of the list? Track Direction should be there. The list has the writable ones first in alphabetical order and after those the non-writeable ones in alphabetical order. Track Direction comes with gimp and is non-writable. If Untitled is the bottom of your list then you've likely got loads missing as that one is usually writeable so usually comes before all the gimp preset ones

those are nice arrows! mine are always crooked.