As you should realize GPS uses ECXYZ (call these 3D or not if you like) and if your receiver can not determine the position of the satellites to match the respective ranges then your receiver won't be able to calculate anything.
Perhaps you should review what Ephemeris and Almanac's are all about. Really if this was not possible then mission planning software wouldn't work would it? And neither would GPS!
How do you think VLBI, SLR and other laser measurement systems locate those GPS satellites with reflectors? Of course GPS satellites can be located and it's quite absurd to suggest otherwise.
Interesting, I didn't know a consumer GPS can display the location of a satellite, any satellite, a TV satellite, let alone a military satellite. Which GPS unit can display that?
, Just name a single recreation GPS. I have a Garmin 76CSx, and a Garmin-45. Maybe you can teach all of us which page will show where each satellite is located.
A GPS receiver does know where they are using calculations, but there is no way a recreation unit will, or can, show you that location. The original post was asking if he/she can use a GPS to locate satellites for setting up of a satellite dish, I assumed he was talking about a TV dish, like DirecTV or DISH.
As for ECXYZ, I assumed that since the OP asked what he did ask, he probably would not know what the heck is ECXYZ. In fact, I would bet the majority of GPS users would not know, or even care, what the heck is ECXYZ. But most everyone probably would understand what 3D means.
As for using lasers system to locate them with reflectors, I am sure the OP, and many other GPS owners has one right in their backyards, or maybe they can borrow one from a friend. I sure don't have one. Do you? Maybe you can use your laser, or your fancy GPS, to help the OP to locate and setup a satellite dish.
I really don't want to drag on this discussion, since it gets us nowhere. But I do want to give the OP the simply and straight forward answer he/she was looking for.