As for the rest of us, we will be able to find them on retailers' shelves pretty soon, if what is said in this leaked memo is to be believed. Google Play store gift cards are expected to go on sale on August 26, which is this coming Sunday. The memo comes from Target's internal system, according to the source. Of course, this is just a rumor, and rumors should always be taken with a grain of salt. Still, it won't be long until we know for sure whether this leaked information is correct or not.
source: Android Police