IIRC, the main reason it was needed at DU2 was largely due to the functionality of that site. We needed a "safe" space to discuss our issues without distractions from others who were not as fully commited to our cause. The groups at DU2 allowed for that which was a nice advantage of having a separate "LGBT Civil Rights and Activism" group. The old GLBT forum at DU2 was not such a safe space.
With the powers that the hosts here at DU3 have, I think we are able to have such a space here in the LGBT group without the need for a second one. I would support removing the other group.