I bought CYVR airport scenery with GSX but when I arrive and find a gate by GSX at CYVR , there are numbers with "?"
That seems to be a problem with encoding, I guess your Windows is non-latin language ?
for example Gate?6, Gate?7 .. with safedog?J
The issue it's just the "?/J", which is supposed to be "/J" instead, indicating the parking has a JETWAY. The "safedog", it's not a security dog, and it's not written like that, and (even in your screenshot) it's "Safedock, which correctly indicates that gate has a Safedock visual docking system.
So, the issue is JUST the "?" character instead of a "/", due to your Windows being not a latin/western version. Doesn't cause any issues, it's just cosmetic.