[xeroinfinity]

First off I'd check the oil level.

I assume your GT is a 3.4, it only holds 4.5 quarts of oil so if its a quart low (which is not good) , the low pressure light should come on.

But it could be the sending unit is faulty or it wires somewhere.
Worst case something internaly could be bad causing the low pressure light to come on.
I wouldnt worry unless the oil pressure light is always on.

On older Ga's(90-96ish) its kinda normal when you first start the engine, or when idling , the gauge would drop to 0 psi but return after you gave it gas.