My roommate has a 6-year-old "GSP" bitch that he got rescued from the shelter.  They told him it was a GSP, but to me all indications point (no pun intended) to an English Pointer.  She has a more orange "liver" color, with orange-ish eyes.  Plus the undocked tail, mostly white body, and shape of the cranium/face indicate EP to me.  I'm including pics so you can see for yourselves.  Either way she's a great dog, I just don't think she's a GSP.

When I adopted Chelsea (the white one in my avatar) they told me they thought she was a mix although she had a docked tail.  She has slightly more of a "stop" than my other GSPs although her jaw isn't as square as most EP's.  To me that dog looks like a mix too--there's something GSP about the expression and face.