I always travel with poppers to GC, Hold luggage, not hand luggage and my luggage has never been searched when arriving. And I have been there dozens of times. I always thought the sex shop in Yumbo sells poppers but I may be wrong.
While it is true a lot of guys are "saving" themselves for the nightlife and just relax during the day there are plenty who are looking to play during daytime. I used the Planeromeo site for hookups and if you log in during the day you get hit up all the time (depending on your profile of course...). Now, since Planetromeo disabled their "classic" version (in favor of their mobile version) I have used it a lot less. The functionality is no longer what it used to be (search filters etc.). I don't know about Grindr as I am not using that.
As for hotels. I have never heard of a gay hotel called 'Seven'. But like with all gay hotels, resorts and even gay friendly hotels with just a large gay clientele (but not 100% gay), there's always the possibility to connect with "friends" around the pool. I know I have.
I always think guys from the US must be disappointed when coming to GC. I haven't been to gay resorts or hotels in the US but I always think hotel and resort accommodation is not up to the same level in GC as in the US. Places aren't as luxurious (some just pretty basic) unless you go to the really expensive hotels (and they don't tend to be gay). Playa del Ingles is sort of a run down place which could use an upgrade. But the sexual tension is high and plenty of horny guys around all year although the high season is in winter. I tend to avoid the family season in summer. But april/may and september and onwards (November is Scandinavian month) are usually good times to go.