This script iterates through the full Google Fonts catalog and checks each font to see how many codepoints from the GF_Latin_African.txt glyphset are included. Can be modified to work with other glyphsets as needed.

gf-glyphset-check.py

# To use this script, place it in a directory with a clone of the
# Google Fonts "fonts" directory and a text file from GF-Glyphssets.
# .
# ├── GF_Latin_African.txt
# ├── fonts
# └── gf-glyphset-check.py
#
# See links below:
#
# https://github.com/google/fonts
# https://github.com/googlefonts/glyphsets/blob/main/GF_glyphsets/Latin/txt/prod-names/GF_Latin_African.txt
#
# This script is hardcoded for the GF_Latin_African.txt glyphset
# but can be modified with a few changes to use any other glyphset.
#
# Run the script from the directory containing the three requiered items:
# $ python3 gf-glyphset-check.py

import glob, os
from fontTools.ttLib import TTFont


# Makes a list from a GF glyphset
# Used to check what codepoints are in a font
with open('GF_Latin_African.txt') as file_in:
    gf_latin_african = [x.rstrip() for x in file_in] # remove line breaks


# Finds all .ttf files in the Google Fonts "fonts" directory
# Adds them to a list called font_list
font_list = []
for file in glob.glob("fonts/**/*.ttf", recursive=True):
    font_list.append(file)


# Gets a list of unicode codepoints from a font
def get_codepoints_from_font(font_path):
    # Open the font using fontTools
    font_to_test = TTFont(font_path)

    # Initialize an empty list to store the code points
    codepoints = []

    # Get the Unicode mapping for the font
    cmap = font_to_test["cmap"].getBestCmap()
    # Iterate through the mapping
    for codepoint, glyph_name in cmap.items():
        # Format the code point as a string in the desired format
        codepoint_str = "uni{:04X}".format(codepoint)
        # Add the code point to the list
        codepoints.append(codepoint_str)

    # Return the list of code points
    return codepoints


def compare_codepoints(gf_glyphset, font_codepoints):
    # Make a blank list of matching codepoints
    matches = []
    # Find matching codepoints
    for codepoint in gf_glyphset:
        if codepoint in font_codepoints:
            matches.append(codepoint)
    # Return the list of matching codepoints
    return matches


# Iterate through all the Google Fonts and print results to standard out
for font in font_list:
    print("\nChecking: ", font)
    codepoints = get_codepoints_from_font(font)
    codepoint_matches = compare_codepoints(gf_latin_african, codepoints)
    print("The number of codepoints from GF_Latin_African in this font:", len(codepoint_matches))
    print("Codepoints from GF_Latin_African in this font...")
    print(codepoint_matches)