Shopify is partnered with different payment gateways in different countries and not all gateways are parternered with Shopify either. Can I ask which country you're based in and I can take a look to see if this gateway is available and if not, which gateways Shopify is partnered with in your location?
I hope this helps and looking forward to hearing from you!
Nick | Community Moderator @ Shopify - Was my reply helpful? Click Like to let me know! - Was your question answered? Mark it as an Accepted Solution - To learn more visit the Shopify Help Center or the Shopify Blog