The following code allows you to enqueue custom Google Fonts through your Child Theme's functions.php file.

freelancer-enqueue-custom-google-fonts.php

add_action( 'wp_enqueue_scripts', 'freelancer_child_enqueue_google_fonts' );
/*
 * Enqueue custom google fonts.
 */
function freelancer_child_enqueue_google_fonts() {
    
    /* 
     * Example of the freelancer_google_fonts_url function
     * with multiple Google Fonts and multiple subsets.
     * Note that the fonts are required, but subsets are optional
     * and only necessary if you're using non-default/custom subset
     * (i.e.. something other than "latin").
     *
    $google_fonts_url = freelancer_google_fonts_url(
        // An array of Google fonts with their respective styles.
        array(
            'Saira Semi Condensed' => '400,700',
            'Lato'                 => '400,400i,700,700i',
        ),
        // An array of Google font subsets associated with the above fonts.
        array( 'latin-ext', 'vietnamese' )
    );
    
    /* # Custom Google Fonts
     * Add Google fonts.
     */
    wp_enqueue_style( 'freelancer-child-fonts', $google_fonts_url, array(), FREELANCER_CHILD_THEME_VERSION );

}