Yes like Andy said you are looking for numbers in the range of 170-200. 180psi is right around what you are looking for on a GSR with stock pistons in it. 190psi would be high, 200psi is not likely to happen on a motor that has been driven even once, and 170psi would be a tad low.

BUT

Your psi in a cylinder is not so important. You are more looking for consitant compression like Andy said rather than Really good compression. You could have 200-200-200-175, well all 4 cylinders are within the specs we gave you, in fact 3 of them have near perfect compression, BUT the last one (175psi) has quite a big jump down from the other 3, that is a sign of a problem. So like Andy said all 4 cylinders should not only be within 170-200psi but should also all be within 10% of eachother.