I would recommend reading the following article which explains exactly what you are a requesting an explanation for:
How to Tell If a Paypal Payment is a Gift | Webupon
Basically, to figure out whether or not a PayPal payment was sent as a gift, you need to click on the 'Details' link in the payment description.
Taken from the article linked above:
Once there, you will see a 'fee amount' (most gifted payments do not have a fee amount). You will also see a link labeled "Issue a refund", click it.
Taken from the article linked above:
Once you have clicked the "Issue a refund" link, you will or will not see a message stating that the payment is currently pending. If the payment is currently pending, the money was NOT sent as a gift. If the money is NOT currently pending, the money was sent as a gift.
Taken from the article linked above:
This is what the page should look like if the payment was NOT sent as a gift:
All of this information was found in the article linked above so please forgive me if any of it is incorrect or no longer relevant/up-to-date.
