Will I lose Guild If I transfer
Dont quote me on it, but I think so, yes, because at least the physical player encounters between US and EU are seperated. If you move to an NA server, you wont be able to interact with EU players anymore.
Yes it should go with you guild membership is no longer locked to regions or servers.
Here are are some posts where others have said it works fine.
https://forum-en.gw2archive.eu/forum/game/players/Accessing-EU-guild-bank-in-NA/first#post4798154
If you want to be extra safe you can make a free account and promote to guild leader as well. That account won’t be able to access the guild vault but should anything go wrong with your main account you will have a leader on the free account to invite your main back. I have a second account I use for that very reason so I always have a backup leader in case I do something weird to my main account.
(edited by JustTrogdor.7892)
The guild doesn’t change when you move from NA to EU or vice versa. The members remain the same, the upgrades remain the same.
The only thing that changes is who you can play with (in open world, instances, and especially WvW).
Guilds were changed ages ago to spawn identically across all worlds in the NA/EU game.