In 7.9.10, it's installing 64-bit everywhere. In (probably) 7.9.11, there will be 32-bit runtimes bundled with the gateway that will be served up to the clients that need them.
For now, in 7.9.10 you can still access the 'legacy' launcher executables (which will use the system's installed Java) in the gateway install directory - check /lib/core/launch.