Haha. Mine is taped to the inside of a pocket. But I know what you mean. When the need arises I will have misplaced it.
But anyway; it's obvious that lasers are much easier in that regard.
There is an advantage to GPS systems:
* if held correctly on your bag/ buggy with a mount - it will be a simple glance away.
* will work when you don't have direct line of sight
* can be more useful to get front/ back of green figures. Can inspire confidence rather than out pressure on you hitting an exact number.