I want to get GMT +7 time into jmeter. I tried following but it seems not GMT.
${__time(dd/MM/yyyy,)}
${__time(hh:mm a,)}
${__time(dd-mmm-yyyy HHmmss)}
${__javaScript(new Date().getTime();)}
As per SimpleDateFormat class documentation
So you can modify pattern of JMeter's __time() function according to your requirement. Examples:
See How to Use JMeter Functions post for more detailed information on __time() and other JMeter Functions.