Without a driver, you might be stuck at 800x600 or 1024x600 without the ability to change it.
A community-developed framebuffer driver available on GitHub that attempts to enable basic display functionality. Mod Driver Gma 3150 Hackintosh Zone
For those using modern bootloaders, a specific Kernel Patch exists to fix cursor corruption on the GMA 3150. Without a driver, you might be stuck at