Once there was a cool way to find out to who you are talking.
You could search for the GM's character at warcraftrealms.com , but it seems like they removed the GM profiles.
I still remember Saldegar, the first GM I've talked to, he is/was a Lvl1 Tauren Druid and he had this char on every German realm, what also explains why you can't see the details by shift-clicking or /who-ing the GM's name.
I guess that the chance you had to meet one GM over the IF gates and talking to another one (What we can clearly see) is such small, that this will happen in 1 of 10k tickets.
Thanks for sharing this with us, Zlux.