Greeting Trush,
I have reviewed the RCSwitch library and I found that this third party library has not been validated for the Galileo board therefore it's not currently supported. However I will suggest you to contact the creator of this library Suat Özgür http://code.google.com/p/rc-switch/ to verify with him if he has plans to port the library to Galileo, but also I noticed that someone ported it to Raspberry PI, may be someone will do the same for Galileo in the near future, please visit this or further posts in the communities to get news about the same library or similar libraries.
Regards,
LDiego_Intel.