no its not really possible because it will require that php gets recompiled with gd support and you most likely cannot recompile php as a regular user. i suggest you make a recommendation to your system admin that gd is popular and would benefit users if they installed and compiled php with it.
edit:
i suppose you may be able to compile the gd sources in your home directory if you have shell access, but you wont be able to use the php gd functions, only use gd from the command line.