[Andreas]

If I understand you correctly, you want to have the All times are GMT +2 hours. The time now is 04:39. to read as All times are GMT +2 hours. The time now is 02:39 GMT., no matter which timezone the user has set.
But all other times should stay as they are.

Then try this:
In functions.php

FIND

PHP Code:

function fetch_time_data()
{ 


BELOW that ADD

PHP Code:

global $timenow_gmt, $datenow_gmt; 


FIND

PHP Code:

$datenow       = vbdate($vboptions['dateformat'], TIMENOW);
$timenow       = vbdate($vboptions['timeformat'], TIMENOW); 


BELOW that ADD

PHP Code:

$datenow_gmt   = vbdate($vboptions['dateformat'], TIMENOW, false, true, false, true);
$timenow_gmt   = vbdate($vboptions['timeformat'], TIMENOW, false, true, false, true); 


FIND

PHP Code:

function init_language()
{ 


BELOW that ADD

PHP Code:

global $timenow_gmt, $datenow_gmt; 


FIND

PHP Code:

$vbphrase['all_times_are_gmt_x_time_now_is_y'] = construct_phrase($vbphrase['all_times_are_gmt_x_time_now_is_y'], $tzoffset, $timenow, $datenow); 


REPLACE that with

PHP Code:

$vbphrase['all_times_are_gmt_x_time_now_is_y'] = construct_phrase($vbphrase['all_times_are_gmt_x_time_now_is_y'], $tzoffset, $timenow_gmt, $datenow_gmt); 


Alter phrase all_times_are_gmt_x_time_now_is_y to read

All times are GMT{1}. The time now is <span class="time">{2} GMT</span>.