Maintenance for the week of May 13:
• PC/Mac: No maintenance – May 13
• ESO Store and Account System for maintenance – May 14, 9:00AM EDT (13:00 UTC) - 12:00PM EDT (16:00 UTC)
I think I've seen Gift cards for Xbox and PS4 online. You could buy a code from Amazon and gift that instead. You could also use the Crown Store gifting system, or gift plain cash instead of a gift card.