i am looking to upgrade my gateway gm5474 's cpu. i have upgraded my power supply to a 600 watt i have upgraded my video car

You can't really. A Brand-In-A-Box PC has its BIOS hard-wired to only support the CPU it has. You'll need a new motherboard. Having said that, this little grouping should do the trick, provided that you have a decent budget to upgrade with:
CPU: AMD FX-6300 3.5GHz 6-core - $120
http://www.newegg.com/Product/Product.aspx?Item=N82E16819113286
Motherboard: ASRock 970 Pro3 - $65
http://www.newegg.com/Product/Product.aspx?Item=N82E16813157364
Video Card: XFX Radeon HD 7950 Dualfan 3GB - $230 (-$30 mail-in-rebate)
http://us.ncix.com/products/?sku=88961&promoid=1306
That should do it. You'll be ready for Battlefield 4 with that setup.