A tiny Tk GUI for compiling GDoc/LaTeX, requires Rob Miller's gdoc2latex (which you can find here: https://github.com/uid/gdoc-downloader)

GDocLaTeXGUI.command

#!/usr/bin/env python      
import Tkinter as tk    
import subprocess
import os

class Application(tk.Frame):              
    def __init__(self, master=None):
        tk.Frame.__init__(self, master)   
        self.grid()                       
        self.createWidgets()
        self.texbasneame = "MyGdocLatexPaper"

    def createWidgets(self):
        self.gdocFileInput = tk.Text(self,height=1,width=50,wrap=tk.NONE)
        self.gdocFileInput.grid(row=0,column=0)
        self.gdocFileInput.insert('0.0','<<<YOUR GDOC http ADDRESS>>');

        self.fetchBtn = tk.Button(self, text='Compile',command=self.compile)
        self.fetchBtn.grid(row=0,column=1)

        # a text area where the output goes
        self.textW = tk.Text(self,height=20,bg='black',fg='green',wrap=tk.NONE)
        self.textW.grid(row=1,columnspan=2)


    def __quit(self,event):
        self.quit()

    def compile(self):
        self.textW.delete('0.0',tk.END)
        self.textW.update()

        self.addLine("=========== fetch from Google Drive ===========\n")
        # get file from GDrive
        with open(self.texbasneame + ".tex","w") as texfile:
            proc = self.runprocess(['python','gdoc2latex.py',self.gdocFileInput.get('0.0',tk.END)], stdoutf = texfile)
            proc.wait() # must wait for finish, or else it deadlocks on the file handle
            self.addLine("done\n")

        self.addLine("=========== run bibtex ===========\n")
        # run bibtex
        self.runprocess(['/usr/texbin/bibtex',self.texbasneame])

        self.addLine("=========== run pdflatex ===========\n")
        # run pdflatex
        self.runprocess(['/usr/texbin/pdflatex',self.texbasneame + '.tex'])

    def runprocess(self, programAndArgs, stdoutf = subprocess.PIPE):
        # simply run the shell script
        proc = subprocess.Popen(programAndArgs,stdout=stdoutf,stderr=subprocess.PIPE)

        if stdoutf == subprocess.PIPE:
            # show the progress in the app, also good for finding out if something went wrong
            for line in iter(proc.stdout.readline,''):
                self.addLine(line)
                
        return proc
                
    def addLine(self,line):
        self.textW.insert(tk.END, line)
        self.textW.see(tk.END)
        self.textW.update()


os.chdir(os.path.dirname(os.path.abspath(__file__))) # change to the current directory, cuz Finders runs it who-knows-where

app = Application()                       
app.master.title('GDoc LaTeX Compiler')
app.master.bind('<Escape>', lambda e: e.widget.quit()) #<Escape> will kill the app
app.master.resizable(tk.FALSE,tk.FALSE)
app.mainloop()