Enables fibroblast growth factor binding activity and laminin binding activity. Involved in negative regulation of fibroblast growth factor receptor signaling pathway. Acts upstream of or within positive regulation of skeletal muscle cell differentiation. Located in extracellular matrix; membrane raft; and synapse. Is expressed in several structures, including alimentary system; limb; metanephros; musculoskeletal system; and nervous system. Orthologous to human GPC1 (glypican 1). [provided by Alliance of Genome Resources, Apr 2022]