If you're asking heel-toe as a technique for racing, I've been taught but never really got the hang of it well. Need more practice I guess.
The right pedals make this a lot easier, the car I learned this on was simpler than any other car I've driven. It had aftermarket pedals that had a really grippy billet brake pedal, and the gas pedal was wider than most.
SRP makes aftermarket pedals for the Sonic, they can make em as grippy as you want for more pedal feel, and you can ask for a custom pair if you'd like a larger gas pedal. On my list of things to buy:
SRP Racing - Custom Aluminum Racing Pedals
About the actual question, yes the pedals are about the same level so in theory if you were good at it you could do it, not like the veloster where the gas pedal is farther back.