If you are subscribed to TrekkSoft you can use your PayPal account instead of the TrekkSoft payment gateway. However, you must pick one gateway, and will not be able to use both gateways at the same time or switch gateways after your first transaction has occurred.
To set up a PayPal gateway, go to Settings > Payments in your TrekkSoft account and select the "3rd Party Payment Gateway" tab.
Enter your API credentials and click Save.
To find your API credentials in your PayPal account, please see refer to this page: