@Kjelt: Thank you for the suggestion.
I read that from Google search but I think it will not work on 2564 chip because:
1) the GQ-4x support reading but not writing for 2564. The writing is for testing purpose only whatever that means.
One out of 6 trials I made has almost 100% perfect copy except 2nd byte. I think whoever programmed the firmware of this GQ-4X knew the pin lay out and had enough data but couldn't solve the problem.
2) 2764's Vpp is 5V & 21V while 2564 requires 25V. I didn't check it but 2532 adapter to 2732 worked because maybe both have same Vpp?
eBay has a $60 programmer which has 2564 in the device support list but it is from China so Iam not sure if I can invest money and wait days to try out the Chinese product. I don't want to be the first person
<Edit>
Searching the Internet search resulted in
"The programmer should have toroidal type of inductor because the 2532 and 2564 chip require strong and longer current."
Probably that is true. I will have to save my time and effort because GQ-4X has two small inductors inside.
I want to hear if anyone had successful experience with 2564.