if my device has logged into someones gmail, will it still show on device list after being factory reset?
Your question is a little unclear so let me know if i got this right.

You were logged in as abc@gmail.com on your tablet/tablets and your friend, being that he had access to this email address, went ahead and deleted everything in your phone, and now you are wondering if he's able to do the same again?

The answer is no, he's not able to wipe your phone again, because when he erased it in the first time, that cleared everything, including all accounts. And as long as you don't add that account back, he won't be able to do any harm.

You can double check this, by going to settings>accounts>Google, and see if "abc@gmail.com" is still there.