We purchased GForge AS 5.5 in 2008.
The support is non-existant.
They take ages to fix bugs.
It is lacking some really simple things - espesially the document management tools.
It is extremely difficult to install.
Only a few linux distros are supported.
Only works on PostgreSQL.
Everyting works 95%, but it is the other 5% you really need to work.
The Office plugins and IDE tools does not work, is seriously useless.
GForge AS ended up costing our company a lot of time.
We are looking for ways to migrate to other alternatives.