Just a proof of concept
Place contents of addons/gdx folder into your addons/gdx folder.
Use GdxRender.render_text to "render" nodes.
Example:
var output = GdxRender.render_text('
<TextureRect texture="res://icon.svg" position:="pos" name="HelloTexture" ref:="texture_ref" />
<Control>
<Label text="Hello world" position:="pos" />
<Label text="Hello world" />
<Control>
<Label text:="text" position:="pos2" />
</Control>
</Control>
', self, {
"pos": Vector2(100, 100),
"pos2": Vector2(200, 200),
"text": "No hello"
})output.refs contains refs you defined inside the code. It's a Dictionary with nodes.
Example:
var ref := output.refs.texture_ref as TextureRect
var tween = create_tween().set_trans(Tween.TRANS_SINE).set_loops()
tween.tween_property(ref, "scale", Vector2(1.2, 1.2), 0.25).set_delay(0.1)
tween.tween_property(ref, "scale", Vector2.ONE, 0.25).set_delay(0.1)
tween.play()See full example inside test_node.gd.