strongSwan support as a Remote Access client has been developed and added to next version:
Check Point recommends to always upgrade to the most recent version
(upgrade Security Gateway / upgrade Security Management Server / upgrade Multi-Domain Security Management).
This is a feature so it won't be back ported to lower versions.
The customer must upgrade to R81 and up to get this feature.
This solution has been verified for the specific scenario, described by the combination of Product, Version and Symptoms. It may not work in other scenarios.