That’s a very misleading article-firstly Hamid Gul was not appointed after Jilani.The fellow who came after Gul ,Akhtar A Rehman,led the ISI during the operations against the ISI for almost 7 years.
Gul headed the ISI from 1987 to 89 & his area of focus was Kashmir.Zia decided to impose the parallel Sharia system in 1980-long before Gul.
The ISI is the most misunderstood organisation in Pakistan & it’s intentionally kept that way-
IF the author bothered to look at the command structure,recruitment procedures & funding of the ISI-he would realise that the ISI is just a part of the army.
You might want to pose that to Dr. Wheeler.