Override Google Analytics Pro event name for renewal purchases

functions.php

<?php

function sv_wc_google_analytics_pro_set_completed_renewal_purchase_event( $parameters ) {

	if ( 'completed purchase' === $parameters['ea'] ) {

		$order_id = (int) $parameters['el'];

		if ( WC_Subscriptions_Renewal_Order::is_renewal( $order_id ) ) {
			$parameters['ea'] = 'completed renewal purchase';
		}
	}

	return $parameters;
}
add_filter( 'wc_google_analytics_pro_api_event_parameters', 'sv_wc_google_analytics_pro_set_completed_renewal_purchase_event', 10, 1 );