There are only two Merchant Parameters on the Elavon tab: Terminal ID and Merchant ID. The Terminal ID actually has two values in it. If you hover the cursor over "Terminal ID", in the file you will see a pop up that states "6 digit Bank Number + 16 Digit Terminal Number." When you build the file you must enter both of these values in that one parameter.
BroadPOS Parameter Name Elavon Parameter Name Number of digits
Terminal ID Bank Number + Terminal Number 22 digits
Merchant ID Elavon MID (Merchant ID) 10 digits
Elavon application supports its gift card. IF the customer asks about using a gift card with that processor, they can use Elevon's gift card just by enabling it in the EDC tab.