In particular, about sysconfig. On SPLAT it is "one script for all" tool, that allows you configuring most of OS and Check Point parameters. But is you are trying to get it on GAiA, here is what you get:
This command is not active
This is made by design, as GAiA provides you IPSO-like experience. Although sysconfig binary is still present, it seems to be completely disabled. CLI is configured to use CLISH instead.
If you are new to CLISH, I advise you to start reading "GAiA Administration manual", chapter 3 or" IPSO 6.2 CLI reference guide" for the matter.
Concerning more advanced tools, like migrate export/import scrypts, there are not too many changes. You find them in the usual place, $FWDIR/bin/updrade_tools, with unchanged syntax.