Can the iPhone 3GS get ios 7?

I saw the iPhone 3GS, from GameStop for only 150. If I jailbreak it when ios 7 comes out can I get ios 7?

No, you can't get iOS 7. The only devices that will most likely get iOS 7, will be: iPhone 4, iPhone 4S, iPhone 5, and The new iPhone.

It may be possible but I doubt it would be good for the phone because iOS 7 will jack up the 3GS an cause alot of lagging, glitching, and will generally make your life very hard. I know this because iOS 6 did that to my iPod touch 4th gen, and the 4th gen was a supported device. This is because each new OS takes up more ram than the previous OS (the 4th gen ha very little ram), and it requires a stronger CPU.

Officially, iOS 7 will be available on iPhone 4 (and later), iPod touch 5g, iPad 2 (and later) and the iPad mini

It doesn't. The 3GS is discontinued. It undoubtedly doesn't have enough horsepower to run it.

Whid00r 7 will