Not sure what the problem is there? But I have never used cgminer.
Looked it up:
GF is Getwork Fail Occasions (server slow to provide work)
RF is Remote Fail occasions (server slow to accept work)
I have 5 GFs in that screenshot, apparently slow enough to make cgminer revert to my alternate pool for a short while. Probably network glitch or something? In the last 24 hr I had 8 more of those. Doesnt seem very serious tho.