We're working on adding gifting to Community, but in the meantime here is a guide to help you send gifts manually to your members.
Step 1: Go to the "Create order" page
Step 2: Create a new customer
Step 3: Copy the information from the Profile Card:
and add it on Shopify:
Step 4: Add your product and add a discount of 100% off:
Step 5: Send your order!