Since v.2.17.0 of Gift Card extension is compatible with Free Gift module, enabling using gift cards as free gifts.
You can find the
'amasty/module-promo-gift-card' package for installing
in composer suggest. Please note that the module is available as a part
of an active subscription. Compatibility is only supported when both the Gift Card (Pro/Premium) and Free Gift (Lite/Pro) extensions are installed.
Starting version 1.1.7 of Gift Card Hyva Compatibility and version 2.1.1 of the Free Gift Hyva Compatibility modules this feature is also available on the Hyva theme. You need to install an additional 'amasty/module-promo-gift-card-hyva-compatibility' module to use it.
To make this work, kindly ensure the following in the Gift Card extension configuration:
1. The Apply Cart Price Rules to Gift Card setting is enabled in Amasty → Gift Card → Configuration → General:
2. The gift card(s) you intend to offer as free gift(s) are set up with the fixed price Amounts: