Please be aware of the following problem:
I requested GUP2 through BKK office in February for a flight in October 2022. Flight was upgraded and seats reserved. Nevertheless I noticed after 2 month that YQ had not been charged to CC and no ticket number has been issued. Called in at FRA office (took ages, horrible!) and they told me that not issuing the ticket was a mistake by BKK agent. So far so good, but since February the QY has gone up significantly and therefore I ended up in paying almost 650 USD in surcharge compared to the initialy quoted 350 USD in February. For the price of a Q-class ticket and on top the enormous YQ I could have bought almost a full revenue ticket in C.
End of story: the initialy booked TG927 got canceled and I am rebooked via TG923 and BKK transfer.
I am TG Gold for almost 17 years, but after my recent experiences I will no longer be loyal to this airline. Flights in February 2023 are now with SQ.