For ASCE wind case, if I leave the frequency value blank, CAESAR II uses the ASCE default of 0.85 for the Gust Factor.

In case I perform a Modal Analysis of the system and obtain that frequency value, the gust factor shall be calculated according to ASCE 7 equations.
It is possible to see the gust factor calculated value?
Where I can find it in report?

Thank you in advance.

No, the computed gust factor is not reported by the software.