Install Developer Toolset 1.1 (gcc 4.7) onto RHEL 5

I have a legacy RHEL 5 system and need to install an application that requires gcc 4.7.

The compatability section of https://access.redhat.com/documentation/en-US/Red_Hat_Developer_Toolset/1/html/User_Guide/sect-Red_Hat_Developer_Toolset-Compatibility.html. Does not claim to be able to build and run on RHEL 5. Will this work for me?

Also https://access.redhat.com/solutions/19458 does not list gcc 4.7 as being compatible with RHEL 5.

Is there a way forward for me?

Andrew