def unicode_to_ascii_punctuation(text):
    """
    A helper function to convert certain punctuation characters from Unicode to ASCII

    :param text: String to process
    :type text: str
    :return: String with ASCII punctuation where relevant
    :rtype: str

    >>> unicode_to_ascii_punctuation('‘GG’')
    "'GG'"
    >>> unicode_to_ascii_punctuation('“G—G”')
    '"G-G"'
    >>> unicode_to_ascii_punctuation('GG')
    'GG'
    >>> unicode_to_ascii_punctuation('⁰')
    '⁰'
    """
    punctuation_map = text.maketrans('“‘—’”', '"\'-\'"')
    return text.translate(punctuation_map)