How to get rid of a double gluteal fold? I am 5ft 4, weigh around 47kg. (Photos)

Hello dear!
Thanks for the pictures and provided information as well.
Based on your photos, you are a good candidate for fat transfer to fix your problem, and I think you'll get very good results. 
l recommend you to make an in-person consultation with a board certified plastic surgeon for a proper answer and to talk about your goals and anything you need to know.
Good luck :)

I agree with one of the earlier responders that the best way to elevate and create a gluteal crease is by anchoring the fascia to the ischial tuberosity.  Having said that, I cannot say that I would recommend the procedure.  In the best case scenario, it makes your folds more symmetric, but comes at the expense of an incision across the gluteal crease.  The scar there tends to be problematic.  Tension is placed on the incision every time that you walk, exercise, or simply just sit down.  This can produce a wide, suboptimal scar, and I have even seen migration of the scar lower on the thigh, ultimately deteriorating what was initially a good surgical result.  You obviously take pride in your figure and you may want to continue to do your best maintaining your body with a thoughtful diet and healthy exercise regimen.  Good luck.