Below is the reply from Aena. They are only allowing Iberia pax in....?
"I am sorry to tell you that from last March on, we were unfortunately told that BA have no more access into the lounge Sala vip Galdós at Gran Canaria Airport. Taking a look at
oneworld website, you will see that the only airline valid to get access is Iberia Airlines (
London Gatwick, for example, includes BA, Cathay Pacific and Iberia Airlines, and
LHR only American Airlines, as you can see by clicking the links).
Since we were very happy to have BA passengers in the lounge, we hope that one agreement will be signed back in the future. Meanwhile, you can keep having access by holding the cards PriorityPass, DinersClub, LoungeKey, LoungeClub, DragonPass or even by buying tickets at the front-office (29,85€ adults and 13,75€ children between 6 and 10 years old, 0-6 are free of charge). Joining
Aena Club Cliente and buying passes thru it, you can also get 20% discount"