They are fortunately still quite common on Gran Canaria and they are a protected species (however most residents view them as pests as the lizards like to hang out in banana plantations), but the population is declining due to loss of habitat and invasive snakes, rats and feral cats. There is also a small, introduced population of them on Fuerteventura.
In Palmitos Park there is a wild/semi-wild (I saw a keeper feeding them) population of them
I would suggest the islands authorities' need to do a lot more to remove all pest animals like rats, feral cats (perhaps also feral dogs), rats and any invasive reptiles.
What non native snakes have been introduced to the island ecosystem of Gran Canaria?
Californian king snake (Lampropeltis californiae). They were introdused during the 1990s, mainly to the area around the capital, but they have been spreading to other parts of the island since.
Sorry for not answering for so long, I only noticed your question now
