The Global Pools (created in UCS Central) do not show up in the UCSM GUI (PE or real) under the "Pools" tree. But --- if you're changing the UUID/MAC/WWxN for any of the local resources, then you should indeed have visibility to the Global Pool names from the resource's corresponding ID pool drop-down menu in the GUI. For example, changing the MAC Pool for a VNIC or VNIC template --- you should be able to see globally defined pool names.
Note that for 2.1.1a, with UUID changes you can see "Global Pools" and "Domain Pools", whereas for VNICs and VHBAs, you'll see both global and local pool names listed together. [Therefore, it's always a best practice to prefix global pool names with "Global-" or "G-", to easily distinguish.]
Hope this helps,
-Jeff