If you don't mind, I've read your case (lol) and can take over where Player^^ left off. READ THE WHOLE THING BEFORE YOU DO ANYTHING ELSE
1. No, you don't want to use restore gpp partition. You'll need to use the "full" restore options. That is restore eMMC Raw GPP, aswell as eMMC boot0/1. But you'll need to do a couple of things first.
2. Your nand backup has been backed up in parts "full.01.bin, full.02.bin" etc. You need to combine these files together to create a complete "rawnand.bin" file, using either the joiner script provided here
https://github.com/CTCaer/hekate/releases/tag/v4.6 (scroll down) or a file joiner program such as this:
https://www.igorware.com/file-joiner.
3. You then place both the "rawnand.bin" file and the boot files under /sd/backup/<serial number>/restore and use both options under "Full" restore in Hekate. However...
4. You need an SD card formatted as exFAT to do this. This is just me guessing, but since your SD Card dumped your Nand in parts, your SD card is either formatted as fat32 or is too small to contain the entire rawnand.bin file, which is 29.1GB large. If you have a SD Card that is atleast 32GB, you can format it to exfat using the windows format tool (if it isn't already exfat) and then place the files on the SD Card and go ahead with the restore.
That should cover up just about everything. Any questions, feel free to ask