There are the odd Fender-made X-180 Park Avenues that pop up now and then - note: this is a very different beast than the GSR X-180.
I recently bought an X-180 Park Avenue, choosing it over an older X-170 only because an insanely low-ball offer I left on the X-180, something I expected to be immediately rejected, was immediately accepted. I do not regret the purchase. I do regret that I could not afford both, however.
What I can say about the X-180 Park Avenue?
The pickups are not distinctively Guild in sound. They do look like HB1s, but they do not sound like them. If I had to categorize the sound, I would say that they are more of an indeterminate Gibsony nature, lacking the clarity and depth of the Guild pickups, leaning more towards a warmer, fuzzier, dirtier sound (comparatively speaking only as they are not inherently super distortion or anything even close to that nature). If one is willing to accept them for what they are and work with them, the X-180 Fender/Guild pickups are very nice, yes. But I do say again, that they are not really anything like the pickups in the older X-170.
The X-180 is a larger guitar, a bit deeper and heavier - probably slightly less comfortable to spend hours behind if you are a smaller person. It also has no sound post, which, together with the larger size, gives it a more archtopy and less solid body-ish sound - this would most likely also make the guitar more susceptible to feedback.
The X-180 has, I think, a slightly wider and shallower neck profile - something I particularly like about the guitar.
The X-180 has, I think, a polyurethane finish rather than the traditional nitrocellulose lacquer. The nitrocellulose finish is time tested - it is known how it ages. The polyurethane less so.
The X-180 Park Avenue shows all the attention to detail and craftsmanship that one would expect from a well-made Guild guitar - Fender did not slouch here.
It is a lovely guitar, I think.
The X-170, well.... , nothing I could say here would add anything to the deserved praises heaped upon it. If you find one in good condition, I don't think you could go wrong.
The biggest stumbling block for the X-180 Park Avenue, I think, for a true die-hard Guild affectionado would be the Fender/Guild pickups. To replace these now with gold HB1s or to have them rewound to emulate HB1s would add greatly to the cost of purchase.