The holds the most respected critical edition: Goraksha Samhita edited by Sri M. M. Pathak (with commentary). While their hardcover book is for sale, they have slowly digitized older editions.
: A major theme is the purification of the body and prana (life force) to remove energy blocks. This process is considered a prerequisite for the awakening of Sakti (Kundalini energy). goraksha samhita pdf upd
Many "Goraksha Samhita PDF" files online are simply image scans (JPG-to-PDF). These are not searchable. An PDF is: The holds the most respected critical edition: Goraksha