Yes and no. If you look up screen_loc in the reference, you will see there is a special format for specifying the pixel-offset at a location with ":".
For example, with a tile size of 32, you can offset a screen_loc like so:
screen_loc = "3:16,5"
However, I don't know how that interacts with the "to" syntax. I know that it will at least round the screen_loc to display full tiles--you can't have half a tile like in your example.
':' specifies a pixel offset.