Yes you can use Golden Gate for replication. But for upgrade you will have to use normal upgrade procedure
There is a migration service from Oracle that includes 9i and higher database as source and 11g and 12c as target.
I don't think that it is free.
But is it certified to use goldengate with EBS?
In the last post i have mentioned URL which states that : -
The use of GoldenGate is not certified for:
- Upgrading E-Business Suite databases from one version to another
- Migrating E-Business Suite databases from one operating system platform to another
but this post is of 2011.
Also some of companies do not afford downtime so they use goldengate for upradation activity in oracle core databases.
Can we use goldengate for EBS db and application upgradation?
if yes can anyone provide me link for same?
As stated in that blog post, using GG to upgrade/migrate EBS instances has not been certified and therefore is not supported