Stick to the court order, when you know he is not going to pick up the kids from school, you show up. Don't allow GF to take the kids. If he wants the kids during his parenting time, after you have picked them up, he can come get them when he does become available.Problem is, she sends me theses msgs from his email address. I know it is get by the wording. I have already Todd him to have her stop but he does not care. I don't know what legal action i could possibly usage against get....
You might also look to modify the order to include some kind of non-intrustion clause. Email your ex and let him know that you will no longer tolerate her involvement in your legal matters and if she continues you will take him back to court. When his current thing gets the email, she will fly off the handle, save that communication as proof of her intrusion. File to modify.
If you don't stop her now, you'll look as if you are okay with her intrusion.