Can you identify Apple iPhone or iPad by Serial Number?

I am about to buy a used iPad Mini 2 Wi-Fi 32gb, everything seems correct (owner specifications vs apple, vs everymac, all through serial number), but the model is ME277GP/A, what are the differences between this one and the "normal" ME277LL/A?

Kind Regards
André Faria

There should be no differences. It should be exactly the same iPad.

The "GP" just identifies it as a model meant for sale in European Countries, such as Portugal, and Switzerland, where as LL is for the U.S. and other parts of North America.

Certainly yes.

You can use this page to identify the device:

Just enter the serial number there, and it will tell you what device it is and if it has warranty coverage.

https://checkcoverage.apple.com/

Make sure the current owner has removed Activation Lock before you had over your money. This is what they need to do: What to do before selling or giving away your iPhone, iPad, or iPod touch

Potentially, yes. Ultimate Mac Lookup - EveryMac.com