Integratration of DPO Payment Gateway to Ultimate Membership Pro Wordpress

We want to integrate DPO Payment Gateway (https://dpogroup.com/integration/) to Ultimate Membership Pro Plugin (https://help.wpindeed.com/ultimate-membership-pro/knowledge-base/step-4-set-payment-gateway-if-applicable/) in WordPress. Currently DPO Payment Gateway has plugin for WooCommerce plugin. But we don't want to use WooCommerce