Functions as transcription regulator in the hedgehog (Hh) pathway. Functions as transcriptional activator. May also function as transcriptional repressor. Binds to the DNA sequence 5'-GAACCACCCA-3' (By similarity). Is involved in the smoothened (SHH) signaling pathway. Required for normal skeleton development (By similarity). The N-terminal domain confers transcriptional repressor activity, while the C-terminal domain mediates transcriptional activation. Belongs to the GLI C2H2-type zinc-finger protein family.