I like Gamos. Bought my first one in '09 (which was also my first break-barrel air rifle, but not Co2 rifle) in .177. Gamo Big Cat 1250. Used PBA pellets mostly. With factory scope dialed in, could hit a dime at ten yards consistently, shot after shot. Sold it after a couple years. Then realized that was a mistake!
Finally replaced it this June, with another Gamo, this time a Whisper Wildcat .22. It has the IGT gas piston instead of spring power like my first one. Very smooth action. Trigger was actually nicer on the Big Cat, it seems, and this .22 doesn't have the extraordinary accuracy (at least at close range!) that I had with my first one, but it's close. With a scope upgrade on it now, can hit a quarter from 10-15 yards. Have already taken several squirrels out of the backyard with it. It packs a punch!
Been thinking about getting another .177 in addition to my .22, and like the idea of the 10-pellet mag on the Swarm!
Have read a lot about Gamo, and watched a lot of reviews, as I get further into this hobby for pesting, and target practice. I'm former US Army, but at this point am more into air guns than firearms. I live in the suburbs and don't have a huge yard, and can only shoot airguns within city limits (and common sense/safety reasons! Neighbors!!) in my backyard anyway. Airguns check a lot of boxes, and ammo is dirt cheap.
I think Gamos are a huge value for the money. The only common complaint I've seen in a lot of reviews or topics on Gamos, is the factory scopes. Seems like it's luck of the draw to get a good one. Maybe their quality control or manufacturing process needs to be improved for their scope department? They should probably just spend a bit more and include a nicer scope with all their models. But otherwise it can be a great way to get into the break-barrel air gun world. They also make a PcP now, too.
Sounds like you got a good one, with a good scope! Congrats and enjoy!