An odd question about the Domain Detail page

[draggar]

Near the top where I can select different portfolios or domains, next to it is a GO button but it doesn't say GO, it says G0 (the letter G followed by the number 0).

It just caught me as odd - is there a reason for it (does the macro or software not allow two upper case letters in a row)?

Just a curiosity thing, honestly it doesn't bother me at all.