I don't remember to have seen any reference to specific SD card speed requirement/s or suggestions at Intel site/s.
I've seen suggestions to use class 10 cards in other -non Intel- sites (https://projects.wyliodrin.com/wiki/boards_setup/arduinogalileo) or in some posts
I haven't had issues with the SD cards I've used so far. According to this document: Product Brief for Intel® Galileo Gen 2 Development Boards, the only requirement specified for the SD card is that it has to be up to 32GB. Unfortunately, there isn't a list of compatible SD cards that I can recommend you, so I would say that the only way to know if the SD card you are talking about works would be testing it.
Just to let you know, currently I use a microSDHC 8GB Class 4 card.