The power steering fluid reservoir on a 2000 Pontiac Grand Prix GTP is typically located
on the driver's side of the engine compartment, near the firewall. It's usually a small, clear or translucent plastic reservoir with a cap that's easy to identify. Look for a label indicating "Power Steering Fluid" or a similar marking.
However, the exact location might vary slightly depending on specific engine options and any modifications. If you can't find it easily, consulting your owner's manual is your best bet for a precise diagram and location.