Digital gift cards are emailed within 1-3 hours (unless you pick a later delivery date). Physical gift cards are processed in 1 business day then shipped out, just like any other order.
Promotional gift cards (gift cards that come free with the purchase of an item) are emailed to you 4 days after your items are shipped.
Newegg.com gift cards can only be redeemed on Newegg.com and are restricted to the country from which they were purchased. For example, a gift card purchased on the Newegg.com UK site can only be redeemed on the Newegg.com UK site.