I created a custom payment gateway in Magento ver. 18.104.22.168 using the following tutorial:
All good, the module is active in my admin area, but is not visible in my frontend checkout page.
How I can enable it?
You try this tutorial: http://www.boolfly.com/magento-payment-tutorial/. Or download code from Github: https://github.com/mrkhoa99/MagentoCodeTutorial/tree/master/Payment. Remember that, you must put API key from Stripe Payment to enable this module.