i am not from the pool team but i am late in this project so i was asking the same and found it out
log into with your account ->
https://login.lisk.io/Open forging on the left side and change to delegates. search for gdtpool and klick the check box.
this is your first vote (preselection).
navigate to
https://liskgdt.net/members and you can see all members you need to vote for
vote for all 32 members by klicking the check boxes ( you can find them all with the search folder )
after klicking for all members you have to klick VOTE on the right top corner.
A window will open with a list of all members you vote for. confirm with your passphrase. its done.
Check your status later - it should be gold reward then
if you like it send me a donation - 1286908522698103094L
Awesome!
It is almost the same with liskelite pool.
log into with your account ->
https://login.lisk.io/Open forging on the left side and change to delegates.
navigate to
https://liskelite.com/member and you can see all members you need to vote for
vote for all members by klicking the check boxes ( you can find them all with the search folder )
after klicking for all members you have to klick VOTE on the right top corner.
A window will open with a list of all members you vote for. confirm with your passphrase. its done.
Now go to
https://liskelite.com/voter and verify your voting address, don't worry this is a one time only
I am enjoying this earnings!!