A emacs-lisp function to convert a spotify-playlist exported from spotlistr to work with gmusic-playlist to import into Google Music.

Spotify-To-Google-Playlist-Converter.el

(defun hour-minute-seconds-to-milliseconds (input)
  "Convert a string of format 01:02:03 to milliseconds."
  (with-temp-buffer
    (insert input)
    (goto-char (point-min))
    (search-forward-regexp "\\([[:digit:]]+\\):\\([[:digit:]]+\\):\\([[:digit:]]+\\)")
    (let* ((hour          (string-to-number (match-string 1)))
           (minutes       (* 60 hour))
           (minute  (string-to-number (match-string 2)))
           (seconds (* 60 (+ minute minutes)))
           (second (string-to-number (match-string 3)))
           (total (+ second seconds)))
      (* 1000 total))))

(defun kill-ring-to-milliseconds ()
  (interactive)
  (insert (number-to-string (hour-minute-seconds-to-milliseconds (car kill-ring)))))

(defun convert-playlist ()
  (interactive)

  (goto-char (point-min))

  (with-no-warnings
    (while t
      (search-forward "|") ;; to ensure failure on when we have passed last item.
      (end-of-line)
      (search-backward "|")
      (forward-char)
      (forward-char)
      (kill-line)
      (kill-ring-to-milliseconds)
      (beginning-of-line)
      (let ((line-move-visual nil))
        (next-line nil nil)))))

You can have a try this Spotify to Google Play Converter, called Free Spotify to MP3 Converter for Mac, which can download Spotify music and playlists as local files compatible with Google Play Music and then you can freely transfer Spotify playlists to Google Player.
This is a detailed tutorial for your reference: How to Transfer Spotify Playlist to Google Play