You need to set up conditional formatting for the cells.
Select the first cell in column G that you wish to control. Goto to the
menu item Format and choose Conditional Formatting.
In the left hand box condition 1, select 'Formula Is' , in the box next to
the right type in =AND($E4=TODAY(),$F4=0)
(Note: I have chosen row 4 above, change to suit your first row); then in
click the Format option and set the Pattern to Yellow.
Click Add>> and in condition 2 set 'Formula Is' and enter in box
=AND(($E4<TODAY(),$F4=0)
Set pattern to Red.
Click Add>> and in condition 3 set 'Formula Is' and enter in box =F8>0
Set pattern to Grey.
Press OK and copy the cell down to all rows to be monitored.

Signature
Regards,
Nigel
nigelnospam@9sw.co.uk
>I would like to shade cells in my spreadsheet based on information
>contained
[quoted text clipped - 7 lines]
>
> Any help would be appreciated.