your question isnt very clear
when you say 'hotspots' what do you actually mean?
1) do you mean your friends mobile carrier can provide access to wifi hotspots as part of the service, eg provide access to bt openzones?
2) do you mean your friend is able to turn his mobile and tether (connect) his ipad to it and use the internet? (i think this is what you mean)
1) Giffgaff dont habe any agreements with wifi hotspot providers such as bt openzone's or the cloud etc but if you are a BT broadband customer you can get bt fon and openzone access for free
you can 'tether' if you buy a gigabag from GG