load_image.gd

var loaded = {}

func get_tex_from_drive(path, flags=Texture.FLAG_FILTER, store=true):
	if store and path in loaded:
		return loaded[path]
	var file = File.new()
	
	if file.open(path, File.READ) == OK:
		# Have file
		var data : PoolByteArray = file.get_buffer(file.get_len())
		var i = Image.new()
		if path.get_extension() == "png":
			var error = i.load_png_from_buffer(data)
			if not error == OK:
				print("Error loading, ", error, "  ", path)
		elif path.get_extension() in ["jpg", "jpeg", "JPG", "JPEG"]:
			var error = i.load_jpg_from_buffer(data)
			if not error == OK:
				print("Error loading, ", error, "  ", path)
		var texture = ImageTexture.new()
		texture.create_from_image(i, flags)
		file.close()
	if store:
		  loaded[path] = texture
		return texture
	return null

Simple snippet for loading images (and creating Texture from it) from outside res://