I think it should be pretty safe secured underneath the bodyGetting lazy and leaving it outside the body and it will smash to bits. Even a hard hit to the chassis and not to the GPS itself will shatter the internals of these Cheaply made GPS's. I'm on my 4th one in 2 years. I now use a GPS padded case and mount it anywhere safe on the chassis. Waterproof and foam padded. I have my recent GPS for over a year now. Not a scratch on it. My next will be the BT version. I don't need to see every single speed as I bash. Gets silly after a while. The novelty wears off quick with repeated broken GPS's rather fast. Don't you think? Just my experience. I only care about immediate speed results when speed running my Lim or Infr. On my Kraton and other rigs. It is no big deal.
I usually download the data using the GPS software on my PC and get more accurate readings Distance traveled, I can adjust the framrates etc . Speeds are usually higher and more accurate to the 10th digit FYI.. Easier to change from KPH to MPH in the PC software. If you are not doing this and only depend on what you see on the display, you are not using it the best way
Amazon.com: Gorilla Box Heavy-Duty Waterproof Magnetic Stash Case for GPS Trackers & Spare Keys - Rust-Proof Magnet - Color-Matched to Car Chassis - (Standard Size)
Once you break several, you will realize it is not practical to leave them exposed and un protected. When your wallet tells you enough already, you may rethink this. IDK. ?