If it's a full length guide rod with no allen head on the end, which would mean it's a two piece guide rod, then you have a one piece full length guide rod.
Here's what I'd do to disassemble, if it was me.....
Flip you thumb safety off, check to make sure it's unloaded (magazine also removed), push the slide rearward until your slide stop lines up with the takedown notch in the slide, push your slide stop out, flip the pistol upside down, slide your slide forward and off of the frame (be sure to keep your recoil spring captured with your hand). Pull the rod and spring past the barrel link. With the spring pressure off the bushing, it's easy/easier to rotate the bushing with your thumb.
Hope that helps.
ETA: Just saw
's post. He's right. Could have been replaced with a GI set up. If you can push the plunger in past the bushing with your finger, you don't have a full length guide rod. You can still take it apart like I described and not need a bushing wrench.