Well ok, but a TV is something of a special case - strong high-frequency magnetic fields and very powerful electron beams. Not quite a "transmitter", but more of a RF noise generator. Moot point actually, because the in-flight entertainment TV screens are often on during TO/LDG.
According to the FCC, this GPS is a Clas B digital device, and complies with Part 15 (whatever that means), but has the standard all-encompassing statement about "this unit generates, uses, and can radiate Radio frequency energy, and if not installed and used according to blah blah blah". So basically it shouldn't be a problem, but don't try it.
I'll stick to using it in my light single...
;-)
Skyeye