When is it safe to have Emsculpt after gallbladder surgery?

I would wait at least 6 weeks after any abdominal surgery and longer if you have any pain at any incision site especially the umbilical site. If there is any chance you may have a hernia at an incision site you should not perform Emsculpt until that incision/hernia is repaired. If you have any questions about your incision site I would contact your surgeon.

Interesting history. I'm surprised the filling your abdomen with during laparoscopic surgery would cause stretching you describe. That being said if your 4-5 week out and have recovered from surgery I'm sure you're ok to continue with EmSculpt.
If you are going to do EmSculpt NEO which also heats the area it possible that the incision near your belly button could get too hot. I have treated over a small incision in this way without a problem but your provider needs to keep an eye on that incision during a NEO treatment if you go in that direction.