B - G collisions

Figure 3.28: The collision of a B glider with a G glider is symmetrical between the T7 and the T8, from both of which a T5 protrudes as part of an incipient $\alpha$ lattice.

B gliders can extend a G glider from two alignments; both resemble B - E collisions, in which the incoming T1 grazes the protruding T5 creating a reararrangement which accomodates another T5. The process can be repeated arbitrtarily often, without any requirements on the spacing between B's.