1.How do I Manage Content in Gift Page
In WordPress Dashboard go to Appearance submenu and click on customize.
After clicking on customize you will in theme Customizer.
Here you have to click on Page template than Gift Page
Here you can Gift Page Title , Description & Seprator.
Go to Customize -> Page Template -> Gift Page -> Enter Here.
2. How to Create Gift Page Template
Go to Dashboard -> Pages-> Add New Page -> Follow screen shot here.