[tz] TAI as a time zone?

Would it be feasible to include International Atomic Time (TAI) and/or GPS time (which differs from TAI by a fixed number of seconds) in the tz database as a time zone separate from UTC? I ask because I'm getting ready to submit at least one calendar to BCP 47 which is based on the leap-second-free TAI, and from the feedback I've gotten so far, it seems that the most widely-acceptable way to deal with the differences between TAI and UTC is to employ the tz database, if it's possible to do so. -- Thank you for your time, -- DataPacRat