Ok. So, the only circumstance in which Gladys\' Pimp would make sense would be if Gladys was modifying pimp.
So if I said something to the extent of, "Geez, I\'d love to go grocery shopping with Gladys\' pimps," then yes, that would make sense.
But you would never put an apostrophe at the end of someone\'s first name if all that followed it was the last name. You would never say, for instance, "Chris\' Piccirillo sure does love to correct grammar."
And you would certainly, never, ever, ever, do one of these: "Glady\'s Pimp and Chri\'s Piccirillo would make ideal pals."
Hope this helps.