I couldn't find a way to get it to happen via a Field Formatting option(there are all kinds of options for specific formats, but nothing I could find to handle adding or subtracting hours).
However, in your SQL query, there appears to be a way that will work:
If you old query was:
Select LastBoot from Nodes;
Your new query should be:
Select DATEADD(hh, 5, LastBoot) from Nodes;
Where 5 would be your offset from GMT. A -5 would work just as well.
Let me know if that works for you.
Thanks for the tip, it does modify the time for me. It would be nice if the offset could be tied to the current timezone offset accounting for daylight savings.
BTW: where can I find the Field Format options?
We use a Microsoft function to do our formatting. The best documentation for I've found for the supported options is here: http://msdn.microsoft.com/en-us/library/73ctwf33.aspx.
The version of the function we use supports most of the options, but there are a couple that don't seem to work('G' for example).