The law in the US states that a percentage of all phones (I think like half, can't remember) produced by manufacturers must have built in GPS.
It doesn't state the required accuracy, to my knowledge, which I suspect to be pretty bad.
Remember it'll be surface mount, so you'd still need a PCB to use it . . .
have they run out of things to legislate?
if you want a burst of paranoia, it is also a legal requirement to be able to provide the government with unencrypted output on any communications equipment sold in the US.
this means all communications equipment sold over the counter in the states are vulnerable to "man in the middle" attacks as end to end encryption is illegal.
it's things like this that hold back the US telecommunications industry, having to reverse engineer "features" to fit in with legislation.
the US cell phone adoption rate was is only now reaching the rate in the rest of the western world.
what new technology will fall into the same trap?