Scienceprog have posted a short post with example of driving 3.2′ graphical LCD on STM32F103ZET6 development board. He adapted LCD driver found on internet to match his board. LCD is Ili9320 controller based which interfaces to STM32 through FSMC interface allowing to program LCD as SRAM memory.
Once set you can write data (pixels, commands) like you would write to SRAM memory. Project Code is based on CodeSourcery GCC tool set which is free. Grab it if you looking for a project template where GLCD is used.