Checked original attachment
If your only looking at G to K
and from Row 2 to last row, try this:
Sub notDoneDontSubmit()
' run on key press of submit button or what ever sub that is run to submit
Dim lc, lr, c, r As Long
' lc = Cells(1, Columns.Count).End(xlToLeft).Column
lr = Cells(Rows.Count, 7).End(xlUp).Row
For c = 7 To 11 ' checking G to K only
For r = 2 To lr
If Cells(r, c).Value = "" Then ' row value can be activeCell or variable
MsgBox ("Please fill in all cells before submitting.")
Cells(r, c).Select
End If
Next r
Next c
End Sub