Most are for original purchaser with proof of receipt from original seller.
Depends where you are, and which GPU.
Check the manufacturers website and support for your region.
Some, such as XFX, have allowed transferrable warranties in the past.
Try opening a support ticket with AMD to ask.
Warranty Questions are answered there:
Je pense que la réponse ne sera aucun transfert de garantie.
S'il vous plaît laissez-nous tous connaître la réponse
AMD Warranty is Non-Transferable so the Warranty on that GPU card purchased from AMD Store by another User, The AMD Warranty only applies to that purchaser and no one else.
Here is AMD Warranty for Consumer GPU cards purchased from AMD: https://www.amd.com/en/support/kb/warranty-information/consumer-graphics-sold-by-amd
Also buying a used GPU card from another person you are taking a risk in that the GPU card can be:
1- Fake GPU card
2-Possibly has been repaired or unknown history of it use (Overclocking, Modified vBIOS, etc).
If you need to purchase a used GPU card as expensive as the one you want I suggest you purchase a Refurbished GPU card from a EU Retailer. That way you will have, at least, a 2 Year EU Consumer Warranty on it from the EU Retailer.
You may as well talk with AMD Technical support about it.
You never know, they might be able to help you somehow regarding information on card availability in France or maybe getting refurbished / returned cards.