Parking in basement

Good morning, We are working on a 22 story office project. The building has also 3 stories below grade that mixed parking (250 parking spaces) and other uses (Auditorium, etc.). According to the LEED User Glossary, the total Gross Square Footage must include all basements levels. Does that include the underground parking levels as well on a New Construction Project? And How we count "number of stories below grade excludingg parking" (at PI FORM 2) if we have 3 stories below grade, 1 only parking use and 2 with differents uses: parking, auditorium, storage, changing rooms, etc. Thany you very much,