code: def read_raw_gdf(
      input_fname,
      eog=None,
      misc=None,
      stim_channel="auto",
      exclude=(),
      include=None,
      preload=False,
      verbose=None,
  ) -> RawGDF:
      """Reader function for GDF files.
  
      Parameters
      ----------
      input_fname : path-like
          Path to the GDF file.
      eog : list or tuple
          Names of channels or list of indices that should be designated EOG
          channels. Values should correspond to the electrodes in the file.
          Default is None.
      misc : list or tuple
          Names of channels or list of indices that should be designated MISC
          channels. Values should correspond to the electrodes in the file.
          Default is None.
      stim_channel : ``'auto'`` | str | list of str | int | list of int
          Defaults to ``'auto'``, which means that channels named ``'status'`` or
          ``'trigger'`` (case insensitive) are set to STIM. If str (or list of
          str), all channels matching the name(s) are set to STIM. If int (or
          list of ints), channels corresponding to the indices are set to STIM.
      exclude : list of str | str
          Channel names to exclude. This can help when reading data with
          different sampling rates to avoid unnecessary resampling. A str is
          interpreted as a regular expression.
      include : list of str | str
          Channel names to be included. A str is interpreted as a regular
          expression. 'exclude' must be empty if include is assigned.
      %(preload)s
      %(verbose)s
  
      Returns
      -------
      raw : instance of RawGDF
          The raw instance.
          See :class:`mne.io.Raw` for documentation of attributes and methods.
  
      See Also
      --------
      mne.io.read_raw_edf : Reader function for EDF and EDF+ files.
      mne.io.read_raw_bdf : Reader function for BDF files.
      mne.io.Raw : Documentation of attributes and methods of RawGDF.
  
      Notes
      -----
      If channels named 'status' or 'trigger' are present, they are considered as
      STIM channels by default. Use func:`mne.find_events` to parse events
      encoded in such analog stim channels.
      """
      input_fname = os.path.abspath(input_fname)
      ext = os.path.splitext(input_fname)[1][1:].lower()
      if ext != "gdf":
          raise NotImplementedError(
              f"Only GDF files are supported, got {ext}."
          )
      return RawGDF(
          input_fname=input_fname,
          eog=eog,
          misc=misc,
          stim_channel=stim_channel,
          exclude=exclude,
          preload=preload,
          include=include,
          verbose=verbose,
      )
  
imports: import os
  import re
  from datetime import datetime, timedelta, timezone
  import numpy
  from scipy.interpolate import interp1d
  from ..._fiff.constants import FIFF
  from ..._fiff.meas_info import _empty_info, _unique_channel_names
  from ..._fiff.utils import _blk_read_lims, _mult_cal_one
  from ...annotations import Annotations
  from ...filter import resample
  from ...utils import _validate_type, fill_doc, logger, verbose, warn
  from ..base import BaseRaw, _get_scaling
label_desc: Use image node_id 16 for calling a global function with example usage: read_raw_gdf(input_fname, eog, misc, stim_channel, exclude, include, preload, verbose) and returns: RawGDF