GS here, using GPU to sit in BizFirst.

- Is CPU a possibility for Global First or would I have to use another GPU? If the latter, is it worth it? (what's the difference?)
- Looks like I'll be arriving in T2. I've heard the new Global First Lounge is for departures. Will I be able to use it? If not, what lounge would folks recommend for a shower? I'll be arriving at 6a and spending the day in London before returning to the airport in the evening.