Show User meta as default value in GravityForm

ywp_usermeta_in_gravity_from.php

<?php
/**
 * GravityForm default user's merge tags doc: https://docs.gravityforms.com/user-merge-tag/
 * Sometimes, default merge tags are not enough for us.
 * With this snippet you can add custom user meta as a 
 * new merge tag to gform.
*/


/**
 * Add gravity form custom merge tag
 */
add_filter( 'gform_custom_merge_tags', 'ywp_add_custom_merge_tag', 10, 4 );
function ywp_add_custom_merge_tag( $merge_tags, $form_id, $fields, $element_id ) {
	$merge_tags[] = array(
		'label' => 'User Phone',
		'tag' 	=> '{user_phone}',
	);

	return $merge_tags;
}

/**
 * replace CMT with real data
 */
add_filter( 'gform_replace_merge_tags', 'ywp_replace_merge_tags', 10, 7 );
function ywp_replace_merge_tags( $text, $form, $lead, $url_encode, $esc_html, $nl2br, $format ) {
	$userid = get_current_user_id();
	$phone 	= $userid ? get_user_meta( $userid, 'phone', true ) : ''; //replace 'phone' with mihan panel user phone that saved in 'wp_usermeta'
	$text 	= str_replace( '{user_phone}', $phone, $text );

	return $text;
}

/**
* show CTM in from fields
*/
add_filter( 'gform_field_content', 'ywp_field_content', 10, 5 );
function ywp_field_content( $field_content, $field, $value, $lead_id, $form_id ) {
	if ( strpos( $field_content, '{user_phone}') !== false ) {
		$userid 		= get_current_user_id();
		$phone 			= $userid ? get_user_meta( $userid, 'phone', true ) : '';
		$field_content 	= str_replace( '{user_phone}', $phone, $field_content );
	}

	return $field_content;
}