just wondering if anyone has ever had or if it is even possible to have a "true" GFE in a lingerie shop or massage parlor?

if so, are there any special "requirements" on the girls part to make it a GFE?

Yes, it is possible to have a GFE experience in a professional setting ...  here are my thoughts, I am sure others will have their own:

1] The girl must be beautiful in the eyes of the man

2] She must genuinely like the man [not all are Katherine Hepburn, when it comes to acting!]

3] Cleanliness/neatness on both sides must be acceptable

If you want more, it would be a private lesson!  If you are in Southern California, I will give you my email address! If you are beautiful, then the lesson is free!!!

it has been for me,   met a lingeri model in 1994 and she and i still see each other, i have her cell phone and she mine,  we have just met for dinner many times, she knows what really turns me on and me being 48 and her being 30,  she won'nt go full escort and says she just loves to see men ejaculate,  she is very passionate with me and sees me in a hotel 2twice a month

the sex is awsome, even after 10 yrs... yes i'm in love with her , but married with 2 kids  14  and 16.

it it possible, but not likely...

I guess the lack of response indicates it is NOT very likely.