The Kofax Mobile Capture app has a demo feature to take a photo of a gift card and return the remaining balance. I did the piece that classifies as the correct brand and extracts the number and PIN from the image. Apparently the team doing the interface did not realize I was doing classification because it has you choose the brand before taking a photo, but this selection has no effect on the results.
The brands supported for balance are Target, Nordstrom, Darden Restaurants (Olive Garden, LongHorn Steakhouse, Bahama Breeze, Seasons 52, The Capital Grille, Eddie V's and Yard House), Starbucks, Costco, and Walgreens. It will make some attempt to classify and extract a much longer list, returning types not listed on the supported list, but balance lookups are not implemented for these.