Let's say your dates are in column A from cell 2 to 5 (range = A2:A5), your names are in column B from cell 2 to 5 (range = B2:B5), your numeric values are in column C from cell 2 to 5 (range = C2:C5).
Try this as your formula:
=SUMIFS(A2:A5,"=Oct-07",B2:B5,"=GH",C2:C5)
What this does is it checks each cell in column A against the criteria =Oct-07 (NOTE - you'll may have to tweak the criteria to fit your date format) and also checks column B values for the criteria =GH. Then, it sums those cells in column C that fit both criteria.
If your criteria comparison is against a value in another cell -- say for example you have the date set in cell E1, then you can use the cell in the criteria thus:
=SUMIFS(A2:A5,"="&E1,B2:B5,"=GH",C2:C5)
The & identifies the E1 as a range versus literal text. This allows you to avoid hard-coding the criteria in the formula which has the benefit of allowing you to change the value in the cell E1 and see what it does to your calculation.
HTH