That is easy: If you read the script, you find the kernel versions that are affected. If you comment put the RHEL 5-8 only lines, you get:
Check Point Security Gateway R80.30
Kernel 2.6.18-92cpx86_64
Edition 64-bit
Build 200
---
This script (v1.0) is primarily designed to detect CVE-2019-11477 on supported
Red Hat Enterprise Linux systems and kernel packages.
Result may be inaccurate for other RPM based systems.
Running kernel: 2.6.18-92cpx86_64
This system is Not affected
---
Check Point Security Management R80.30
Kernel 3.10.0-693cpx86_64
Edition 64-bit
Build 200
---
This script (v1.0) is primarily designed to detect CVE-2019-11477 on supported
Red Hat Enterprise Linux systems and kernel packages.
Result may be inaccurate for other RPM based systems.
Running kernel: 3.10.0-693cpx86_64
This system is Not affected
CCSE / CCTE / CTPS / CCME / CCSM Elite / SMB Specialist