The FA20 is Direct Injection, it's also Port Injection. It uses Toyota's D4-S injection system. So the intake valves do get washed. Subaru also makes their own FA20 Turbo Direct Injection engine, but it uses Subaru's own Direct Injection system.
I also own a 2010 GTI. If I plan to keep it. I will have to have the intake removed and valves cleaned around 40,000 miles.