It's a screenshot of some tool used to collect pairs of things the game refers to and their associated values; this information is purportedly obtained from a GT6 save file. That means the extra layer of encryption has been broken (which was already known); more than that, its contents are already being deciphered (which was also already known).
When this happened for GT5, a few modding tools appeared that allowed for modification of the cars in the garage and other things, well beyond the scope allowable in the game. The implication is that this means the same for GT6.
A few things have changed since then, though. There was talk of releasing public tools for all players only once the game was being played by much fewer people (e.g. long after its release). The breaking of the GT6 save encryption has already weathered 8 months of badgering from impatient would-be "hackers", so that seems likely to continue.