Apply SKIPSHEET feature
There are actually two ways to skip sheets in GLSU. You could select the individual worksheets to post/park using the Multiple Worksheets feature. Alternately, you can simply add the keyword skipsheet in cell A1 on every sheet that you never want to be acted upon by the export, post, or park functions. Sheets marked in this way will simply be skipped over. The feature is great for excluding those sheets that you use for calculations, VLOOKUPS(), and other non-GLSU helper sheets.