internally we use GMT only, which is why you see GMT timestamps when using sdmsh.
If you open the Web Users dialogue, you'll find a property called "Default Time Zone", here it looks like:
If I the look at my Masters list, it shows the timestamps in MEST:
After changing my default time zone to Asia/HongKong, as in the screen shot below, the times as shown in the masters list are now GMT+8.
And the corresponding masters list:
(Hint: you can see by the IDs that I didn't cheat ;)