If this does not work for you please follow this guide;
* Join the server
* Don't touch anything
* Leave your computer until your in.
* Problem solved.
When you join the server, dont move or do ANYTHING with your mouse or keyboard. The ONLY thing you should do is move your mouse to, let's say a car.
ALT + TAB out of the game and watch some videos untill you get loaded in and unstuck.
Dont open G-Mod if you think you are unstuck. Just mouse over the G-Mod icon and see if the car has moved.
If it moved, you are unstuck.
If it didn't move. Keep waiting.