Catalysis of the reaction: GDP-alpha-D-mannose + n {-alpha-D-Man-(1->6)}60-(Man9GlcNAc2- = phosphorylated {-alpha-D-Man-(1->6)}60-(Man9GlcNAc2- + n GMP + n H+ or GDP-alpha-D-mannose + alpha-D-Man-(1->3)-alpha-D-Man-(1->3)-alpha-D-Man-(1->2)-alpha-D-Man-(1->2)-alpha-D-Man-3-O-(Ser/Thr)- = alpha-D-Man-(1->3)-alpha-D-Man-(1->3)--alpha-D-Man-(1->2)-alpha-D-Man-(1->2)-alpha-D-Man-3-O-(Ser/Thr)- + GMP + H+.
mannosylphosphate transferase activity