Blending particles from geometry shader

Hello,
I use a jit.gl.mesh @draw_mode points @blend_enable 1 @blend_mode 6 7 @shader postProcess.
The postProcess shader creates several points from each vertex using a geometry program that calls EmitVertex() multiple times.
Is it a general limitation that these emitted vertices do not blend resp. ignore the blend mode
- e.g. 2 vertices a red one (RGB = 1, 0, 0) and a green one (RGB = 0,1,0) at the same position result in a green rendering and not in yellow ?
It looks like the vertices that have been created first with EmitVertex() are hidden behind the vertices that are created after.