#xcf

I use GIMP 2.10 and some layers (or groups) are color coded:

Blue mark: change the color layer to another of your liking.

Orange mark: change the picture by putting another picture in the color marked layer group. (I created a group so you don't have to change the composite mode of your layer upon adding it to your image).

Red mark: change the text.

Green mark: show the layer/layer group or not.

Grey mark: groups with that mark contain customizable elements.

I use guides to be able to align layers easily. You can toggle their display in View > Show Guides.

Feel free to display or not elements in the UI section.

Quick disclaimer: the following images are for a French Gimp version.

STEP 01.

Create or open the XCF project you want the text message in. You will now import the SVG as a path.

If you don't already, have the path window open. You can find it in Windows > Dockable Dialogs > Paths. On my Gimp, as I am in single-window mode, the Paths dialog window is automatically docked to the Layers-Undo dock as a tab.

On the Paths dialog tab, open the Paths menu and import the SVG by selection "Import a path".

If you've done everything correctly, you should see a new path named "Text Message" in your Paths tab!

STEP 02.

Now, you can modify the path with different tools according to your needs: transform, scale, rotate, flip... Just make sure you always choose the Path to be transformed!

You can select whether to transform a layer, a selection or a path on the tool options.

STEP 03.

After transform, it's now time to actually have a text message. You'll start by creating a new layer that will have the background color on it. I called mine "Text Message BG".

You will now go back to the Paths tab and create a selection from the path, by selecting the Text Message path and then choose in the Path options "Path to Selection". There is also a shortcut button at the bottom of the Paths tab.

Now, you will see the selection is only a border. You will need to add the inside rectangle to the selection.

You can do so by selecting the Rectangle option and putting it in "Add to Selection" mode. (You can also be in "Add to Selection" mode by pressing Shift while doing the rectangle.)

Now, you can fill your selection with a color! (Don't forget to change your foreground color with the one you want to fill prior to doing the fill!)

You know have a background for your text message!

STEP 04.

We will now add text. You might be wondering why in this SVG file there is an inner rectangle. It is actually meant to serve as a guide for your textbox and still have some padding.

To use the inner rectangle of the path as a guide, you have to toggle Paths as a guide. To do so, check the box in Display > Align on active path.

Now you can select the Text tool and create your textbox while following the inner rectangle. You should be able to feel that the textbox will naturally clip to the edges of the path.