That's my issue, breif description says 2nd time zone, watch says GMT. Manual does not cover that model.... Xezo, Longines, Chopard, Fortis, Carl F Bucherer and some others use the 7754,, but can't find confirmation that they are a true GMT hand.
Thing is the 7750 has two setting and one winding positons, it would need a third position or something for GMT time.
The 7750 has quite a few modifications, moonphase, triple date and a gmt or perhaps a 24hr hand. I see your point, only one winding post three positions. My Breitling is a 7750 same deal three postions. I do know some of the ETA 289- series watches use the second position for both date and GMT either clockwise or counter clockwise. I believe that is how Omega does their GMT's (Seamaster and DeVille) Perhaps a phone call to the maker is in the cards for tomorrow.
I was not sure either, Xezo USA contact site and I specifically asked if it had a true independant GMT hand. So I guess that the Valjoux 7754 has a true GMT complication.