If by gap analysis, you mean self-assessment of one's current status against AS9100D requirements, I will share a blank template I use. I only included the first page of the spreadsheet since the AS9100 standard is a document you have to pay for, but I think its use is straightforward. Rows are "grouped" in Excel in the left margin to facilitate collapse or expansion of individual sections. A subsection summary calculation appears at the top of each section.