This shield use "SoftwareSerial" library and somehow the Intel Galileo Gen 1 doesn't support yet.
At least the Arduino IDE will raise "Error" like below ....
1)/Users/Mxxxxx/Downloads/Arduino_Galileo 1.5.3.app/Contents/Resources/Java/libraries/SoftwareSerial/arch/x86/SoftwareSerial.cpp: In constructor 'SoftwareSerial::SoftwareSerial(uint8_t, uint8_t, bool)':
(2)/Users/Mxxxxx/Downloads/Arduino_Galileo 1.5.3.app/Contents/Resources/Java/libraries/SoftwareSerial/arch/x86/SoftwareSerial.cpp:18:7: error: 'LINUX_SOFTSERIAL_TTY_OBJ' was not declared in this scope
I don't know why they said support like arduino uno, but the basic library like softwareserial doesn't yet support, what a pain!