Exchange rate quoting conventions completely, different, because, Google, dollars

Andreas42

According to the last errata for CFA Level II,
http://www.cfainstitute.org/Eratta/2013_level_II%20_errata_as_of_29_octo...
the convention is $/￡ or ￡ for dollars to the pound, but Google Finance quotes this rate as
British Pound Sterling (￡) / US Dollar ($) (GBPUSD)
and Yahoo! Finance quotes the rate as
GBP/USD (GBPUSD=X)
So these are completely wrong unless they use a completely different convention for the three-letter trading symbols, because I’m suspecting that
$/￡
￡
GBP/USD
GBPUSD
GBP:USD
all quote the same rate, although it seems ridiculously inconsistent to me.
EDIT: I know it’s inconsistent, because “GBP/USD” on the popular search engine websites is what the CFA curriculum refers to as “USD/GBP”.  Somebody care to help me out here?