Seems to be involved in the cross-linking of microtubules and microfilaments (By similarity). Regulates microtubule dynamics and stability by interacting with microtubule plus-end tracking proteins, such as MAPRE1, to regulate microtubule growth along actin stress fibers (By similarity). Interacts with MAPRE1. Colocalizes with the tips of microtubule plus ends. Belongs to the GAS2 family.