Before we get to connecting Hike POS to 99minds make sure you have enabled the Gift Card option in your Hike store.
To Enable the Gift Card feature, Go to Products -> Gift Cards and Click on Activate Gift Cards. Select Yes on the pop-up that displays.
Next, log in to your 99minds dashboard and go to Settings > Integrations. Find the Hike integration and click on Connect
On the next screen, log in to your Hike store.
Click on Accept on the next screen to allow 99minds to access your Hike store.
That's it! Your Hike POS store is not connected to 99minds. Gift cards purchased/redeemed on your Hike POS will be synced to 99minds. And Gift cards purchased/redeemed on 99minds (and any other integrations like BigCommerce, Shopify) will be synced to your Hike store.