Red Hat is surely and clearly involved in the GNOME project, and has been for quite some time. But your statement is easily understood that Red Hat *controls* the project. I would say that's a fairly unbiased statement.
In 2010 this GNOME census  presentation was given. And it surely puts Red Hat high up in the contributors list, but it is actually *not* the biggest player in this game all in all. Red Hat is given credit for 16.30% of the commits, while there are 16.94% of unidentifiable companies (I presume) and 23.45% of the commits were from VOLUNTEERS. These three groups sums up to ~57% of all commits to the GNOME project. Red Hat's contribution in this context is a little bit less than 1/3 of the top 3. And then you have ~43% of commits from contributors which is not among the top 3.
So to say that Red Hat is behind GNOME is fairly unfair to the majority of contributors. I'm sure Red Hat is proud of their GNOME contributions, but they probably don't want (or need) to take the glory from the other contributors as well.