GRC support Pack Upgrade

I am using GRC version 5.3 SP 13 on NW 7.01 SP 07. I have been asked to upgrade the support level of GRC. When I go to the GRC patches on SAPNET it seems that the only componts available are the 5.3 SP versions - 13 to 19 which is fine. I would like to know is it advisable or a pre req to also upgrade the NW SP level? From what I have read I only see that the GRC 5.3 updates are required. I have read OSS note 1433940 and I don't see any dependancies for the NW stack, however just wanted to make sure as the note mentioned upgrading NW 7.0 to 7.01.

Also when upgrading the GRC component is a requirement to also update the RTA versions on the connecting systems?

Any help or advise would be really apprciated.

Thanks

Ajay