Use nvidia-smi to get data then send an E-mail.

nvidia-gpu-load-monitor.py

#!/usr/bin/python
# -*- coding: UTF-8 -*-

import subprocess
import re
import time

import smtplib
from email.mime.text import MIMEText

smiexe = r"C:\Program Files\NVIDIA Corporation\NVSMI\nvidia-smi.exe"
badload = 90 # CHANGE IT AS YOU LIKE

smtp_server = "smtp.xxx.com"
from_mail = "[email protected]"  
mail_pass = "yourpassword"
to_mail = ["[email protected]"]    
from_name = "MINE MONITOR"
subject = u'GPU LOAD: XXX'

def sendMail(content):

    msg = MIMEText(content, 'plain', 'utf-8')
    msg['Subject'] = subject
    msg['From'] = "{}".format(from_mail)
    msg['To'] = ",".join(to_mail)
    
    try:
        s = smtplib.SMTP()
        s.connect(smtp_server, '25')
        s.login(from_mail, mail_pass)
        s.sendmail(from_mail, to_mail, str(msg))   
        s.quit()
        print(time.strftime("%Y-%m-%d %H:%M:%S",time.localtime())+"  MAIL SENT!!")
    except smtplib.SMTPException as e:
        print("Error: %s" %e)

def checksmi():

    smi = subprocess.Popen(smiexe, stdout = subprocess.PIPE,
                           stderr = subprocess.PIPE, shell = True)
    smidata = smi.stdout.read()
    rule = r'(.*?)%      Default'
    slotList = re.findall(rule,str(smidata))

    for i in range(0,len(slotList)):
        slotList[i] = int(slotList[i][-3:].strip())

    if max(slotList) < badload:
        sendMail(smidata.decode('utf-8'))
    else:
        print(time.strftime("%Y-%m-%d %H:%M:%S",time.localtime())+"  ALL GPU OK:  "+ str(slotList))

while True:

    checksmi()
    time.sleep(30) # CHANGE IT AS YOU LIKE