[LibGDX] Calling LWJGL/OpenGL glBegin

I am trying to render in GL_TRANGLE_FANS for one of my projects, but my problem is I can’t seem to call OpenGL’s glBegin(int) using Gdx.gl or any others (gl10, 20, 11, common).

Apparently you can use Meshes, however with the way I need to do things I need to use OpenGL’s state base rendering (glBegin(GL_whatever_shape);//choose vertex3f’s;glEnd();).

What do you guys think?

Thanks,
-cMp