That's why I said 5200. It's a polyurethane glue that is designed to be permanent. I've used it to glue Starboard down, and that stuff is famously hard to glue. I've also used it to seal between nylon hull fittings and the hull under the waterline on boats. It moisture cures and sticks to most plastics.
Between the layer lines on the print and the adhesive it should stay.
FWIW I used Gorilla Glue to stick some silicone mat to a PETG cell phone holder I printed and it's been in the truck for 3 months now. It's still attached, but I could peel it off if I tried.